What Are the Seven Sacraments?
Short Answer
The seven sacraments of the New Law are
Baptism,
Confirmation,
the Holy Eucharist,
Penance,
Extreme Unction,
Holy Orders and
Matrimony.
They were all instituted by Jesus Christ and entrusted to His Church as visible and efficacious signs through which He communicates supernatural grace to souls.
The Baltimore Catechism gives the familiar definition: a sacrament is “an outward sign instituted by Christ to give grace.”
The Catechism of St Pius X expresses the same doctrine by describing a sacrament as a sensible and efficacious sign of grace instituted by Christ for our sanctification. These outward signs do not merely remind us of grace. By Christ's institution, they truly signify and produce the sacramental effects proper to them in those who receive them without placing an obstacle in the way.
The Church traditionally explains a sacramental sign in terms of matter and form. The matter is the sensible element or action employed; the form is the determinate words which give the sacramental sign its meaning. A valid sacrament must also be administered by a valid minister capable of conferring it, and the minister must have at least the intention of doing what the Church does. The Council of Trent solemnly taught this requirement of intention.
The seven sacraments therefore belong neither to medieval invention nor merely to ecclesiastical custom. The Council of Trent (1545–1563) definitively taught that all seven were instituted by Christ and that there are neither more nor fewer than these seven.
Why This Question Matters
Christianity is not merely a system of doctrines to be believed or moral rules to be obeyed. Christ established visible means by which the fruits of His Passion are applied to individual souls.
The sacraments stand at the centre of Catholic life because through them a man is spiritually born, strengthened, nourished, forgiven, assisted in serious illness, given sacred powers for the service of the Church, or sanctified in Christian marriage.
Understanding what a sacrament actually is also prevents two opposite errors.
The first is to treat the sacraments as mere symbols: outward ceremonies that express a person's faith but do not themselves communicate supernatural grace.
The second is to treat them almost magically, as though words or ceremonies automatically sanctified a person regardless of Christ's institution, the required sacramental elements, or the disposition of the recipient.
Catholic doctrine rejects both errors. The sacraments are objective instruments of Christ's grace, but they operate according to the nature Christ gave them.
This is also why questions of matter, form, minister and intention become so important when the validity of a sacramental rite is disputed. A ceremony may be beautiful or ugly, traditional or recently composed, reverent or irreverent; those considerations do not by themselves settle sacramental validity. Validity must be examined according to the sacramental principles established by the Church.
What the Catholic Church Teaches
What Is a Sacrament?
The Roman Catechism, published by order of Pope St Pius V in 1566, explains that a sacrament is a sensible sign of an invisible divine action. Baptism, for example, employs an external washing with water while signifying and accomplishing the spiritual cleansing of the soul. It stresses that the sacraments not only signify, but also contain and effect, what they signify.
The Catechism of St Pius X similarly teaches:
A sacrament is a sensible and efficacious sign of grace, instituted by Christ to sanctify our souls.
The words sensible sign mean something perceptible to the senses: water, bread and wine, oil, the laying on of hands, spoken words, or another outward action established for the sacrament.
The words efficacious sign are equally important. A sacrament is not merely a picture or reminder of an invisible reality. By Christ's institution, it actually produces the supernatural effect it signifies.
The Outward Sign and the Inward Grace
Every sacrament therefore involves an outward sacramental sign and an inward supernatural effect. The outward sign can be perceived by the senses. The inward grace cannot.
Grace is not a material substance hidden inside water, oil or bread. It is a supernatural gift of God by which the soul is sanctified and elevated to participation in the divine life.
Some sacraments principally give or restore sanctifying grace. Baptism gives the spiritual life of grace to one who has not yet been baptized. Penance restores that life when it has been lost through mortal sin.
The other sacraments principally increase sanctifying grace in a soul already possessing it and confer the particular sacramental grace appropriate to their purpose: strength in Confirmation, supernatural nourishment in the Eucharist, assistance in serious illness through Extreme Unction, grace for sacred ministry through Holy Orders, and grace for the duties of Christian marriage through Matrimony.
The sacraments thus correspond to different necessities of the supernatural life.
The Sacraments Were Instituted by Jesus Christ
The Church does not possess authority to invent sacraments.
The Council of Trent, Session VII (3 March 1547), Canon 1, solemnly taught:
“If any one shall say, that the sacraments of the New Law were not all instituted by Jesus Christ, our Lord; or, that they are more, or less than seven ... let him be anathema.”
Trent then names:
Baptism, Confirmation, the Eucharist, Penance, Extreme Unction, Orders and Matrimony.
This does not mean that the New Testament records an identical ceremony in which Christ publicly announces the institution of each sacrament using later scholastic terminology.
Some institutions are recorded with exceptional clarity. Christ commands Baptism in Matthew 28:19; institutes the Eucharist at the Last Supper; gives the Apostles authority to forgive sins in John 20:22–23; and confirms the divine institution of Christian marriage in His teaching on the indissoluble union of husband and wife.
For other sacraments, Scripture records their apostolic administration or teaching while the Church also knows their divine institution through Apostolic Tradition.
The dogmatic fact remains: the author of the sacraments of the New Law is Christ, not the medieval Church.
Matter and Form
The external sacramental sign is traditionally analysed in terms of matter and form.
The Roman Catechism explains:
“The word is joined to the element, and it becomes a Sacrament.”
This is drawn from St Augustine of Hippo (AD 354–430), Tractates on the Gospel of John, Tractate 80.3, where he explains the conjunction of the visible element with the sacramental word.
In general:
Matter is the sensible thing or action used in the sacrament.
Form is the essential verbal formula determining the sacramental meaning of that matter.
In Baptism, for example, the matter is true water applied in a washing, while in the traditional Roman form the minister says:
“I baptize thee in the name of the Father, and of the Son, and of the Holy Ghost.”
The water alone is not Christian Baptism. Neither would the words alone, without the baptismal washing, constitute the sacrament. The sacramental sign arises from their required conjunction.
The terminology must nevertheless be applied carefully.
In Penance, Catholic theology speaks of the penitent's contrition, confession and satisfaction as the quasi-matter, while sacerdotal absolution provides the form.
In Matrimony, the spouses' valid exchange of matrimonial consent constitutes the essential sacramental sign, while theologians have historically differed over the most exact scholastic allocation of “matter” and “form.”
Matter and form are therefore genuine sacramental principles, but they should not be forced into an artificially crude “physical object plus sentence” model.
The Minister
A sacrament must also have a person capable of administering it. That person is called the minister.
Different sacraments have different ministers. A priest cannot simply decide to consecrate another priest; episcopal consecration is required for the conferral of Holy Orders. A layman cannot consecrate the Eucharist. On the other hand, Baptism can, in necessity, be validly administered even by a person who is not a priest, provided the proper essentials and intention are present.
The minister acts instrumentally. The ultimate giver of sacramental grace is Christ. St Augustine expressed this vividly when discussing Baptism: although Christ's disciples perform the outward ministry, Christ Himself remains the One who cleanses. Consequently, the personal holiness of the minister is not what makes a sacrament valid.
The Council of Trent condemned the proposition that a minister in mortal sin necessarily fails to confer a sacrament when he observes what is essential to it.
This principle was particularly important against the ancient Donatist error, which effectively made sacramental efficacy depend upon the worthiness of the minister.
The Minister's Intention
The minister nevertheless must intend to perform the sacramental act of the Church.
Trent, Session VII, Canon 11, taught that ministers must have:
“the intention at least of doing what the Church does.”
This requirement does not mean that the minister must possess perfect theology, great personal faith, or even personal holiness. Nor must he inwardly understand every supernatural effect of the sacrament.
What is required is an intention to perform the religious act which the Church performs — rather than merely pretending, acting on a stage, demonstrating the ceremony for instruction, or deliberately intending to do something essentially different.
The Baltimore Catechism accordingly explains the proper intention as the intention to do what Christ and His Church intend in the administration of the sacrament.
Matter, form and ministerial intention therefore work together. The Church does not teach that merely pronouncing certain syllables mechanically always produces a sacrament.
Grace Ex Opere Operato
The Council of Trent also teaches that the sacraments confer grace ex opere operato. This expression is sometimes misunderstood.
It does not mean “automatically, regardless of everything else.” It means that the sacrament's objective efficacy comes from Christ and the sacramental act He instituted, rather than from the holiness of the priest or the emotional intensity of the recipient.
Trent taught both that the sacraments truly contain and confer the grace they signify and that grace is conferred through the sacramental action upon those who place no obstacle in its way. The recipient's dispositions therefore still matter.
A valid sacrament may be received fruitfully or unfruitfully depending upon the sacrament and the recipient's spiritual condition. The Eucharist, for example, must not knowingly be received in mortal sin.
Validity and fruitful reception are not the same question.
Historical and Theological Evidence
Sacred Scripture
The Bible does not contain a chapter entitled “The Seven Sacraments.” Nor does it give seven definitions arranged according to later scholastic terminology.
It does, however, provide the scriptural foundation for the sacramental life Christ entrusted to His Church.
Baptism: Christ commands His Apostles to baptize all nations “in the name of the Father, and of the Son, and of the Holy Ghost” in Matthew 28:19. He teaches the necessity of rebirth “of water and the Holy Ghost” in John 3:5.
Confirmation: In Acts 8:14–17, baptized Christians in Samaria receive the Holy Ghost through the laying on of the Apostles' hands. A similar apostolic action appears in Acts 19:5–6.
The Eucharist: At the Last Supper Christ declares the bread to be His Body and the chalice His Blood and commands the Apostles to “do this” in commemoration of Him. See Luke 22:19–20 and 1 Corinthians 11:23–29.
Penance: After His Resurrection Christ breathes upon the Apostles and declares: “Whose sins you shall forgive, they are forgiven them; and whose sins you shall retain, they are retained.” See John 20:22–23.
Extreme Unction: James 5:14–15 commands the sick man to call for the priests of the Church, who are to pray over him and anoint him with oil. Trent teaches that this sacrament was instituted by Christ, intimated in Mark 6:13, and promulgated to the faithful through St James.
Holy Orders: Christ commissions the Apostles to continue the Eucharistic sacrifice and confers upon them sacramental powers which are subsequently transmitted through the laying on of hands. St Paul reminds St Timothy to “stir up the grace of God” imparted through the laying on of his hands in 2 Timothy 1:6.
Matrimony: Christ restores marriage to its divinely established unity and indissolubility in Matthew 19:4–6. St Paul describes Christian marriage in relation to Christ and His Church in Ephesians 5:31–32.
Scripture therefore shows the sacramental realities. The Church, receiving Scripture together with Apostolic Tradition, authoritatively identifies these seven as the sacraments instituted by Christ.
The Early Church Fathers
Early Christian writers do not normally present a scholastic textbook chapter listing “matter, form, minister and intention” in the terminology later perfected by Catholic theology. Nor does every Father use the Latin word sacramentum with exactly the restricted technical meaning eventually established in theology. That historical fact should not be concealed.
What the Fathers do show, however, is the antiquity of the underlying sacramental realities.
St Ambrose of Milan (c. AD 339–397), in On the Mysteries (c. AD 387), explains Baptism as a visible washing whose supernatural efficacy comes from the Holy Ghost, discusses the post-baptismal anointing, and gives an explicitly supernatural account of the Eucharist. His work demonstrates that these were not regarded as merely symbolic community ceremonies.
St Augustine of Hippo (AD 354–430), in Tractates on the Gospel of John, 80.3, gives the classic principle:
“The word is added to the element, and there results the Sacrament.”
Augustine's writings also strongly distinguish the divine efficacy of Baptism from the personal worthiness of the human minister — a principle of enormous importance in the Church's struggle with Donatism.
The later precision of sacramental terminology therefore represents a clarification and systematic formulation of realities already present in the Church's worship and teaching, not proof that the realities themselves originated in the Middle Ages.
The Council of Florence
The Council of Florence, in the Decree for the Armenians (1439), gives an especially concise account of Catholic sacramental theology.
It enumerates the seven sacraments and explains that for their confection there are necessary a sensible element or matter, the words constituting the form, and the person of the minister, who must possess the intention of doing what the Church does.
Some of Florence's detailed disciplinary or ritual descriptions must be interpreted within their proper historical context; later authoritative decisions, particularly concerning Holy Orders, clarified which elements belonged to the substance of a sacrament and which belonged to changeable ecclesiastical rites.
The underlying principles of matter, form, minister and intention, however, became standard Catholic sacramental theology.
The Council of Trent
The Protestant Reformation made a definitive response necessary.
At its Seventh Session on 3 March 1547, the Council of Trent solemnly taught that:
the sacraments of the New Law were all instituted by Jesus Christ;
there are exactly seven;
they are not merely ceremonies for nourishing faith;
they contain and confer the grace they signify;
sacramental grace is conferred ex opere operato upon those who place no obstacle;
Baptism, Confirmation and Holy Orders imprint a sacramental character and therefore cannot be repeated;
the minister must intend at least to do what the Church does;
the minister's state of mortal sin does not by itself invalidate the sacrament.
This is not one theologian's theory. These are authoritative doctrines of the Catholic Church.
St Thomas Aquinas
St Thomas Aquinas (c. 1225–1274) treats the sacraments extensively in the Summa Theologiae, Third Part, Questions 60–65.
In Question 60 he explains the sacrament as a sign ordered to man's sanctification and explains why sensible things and determinate words appropriately constitute sacramental signs.
In Question 62 he explains sacramental grace.
In Question 64 he distinguishes God as the principal cause of grace from the human minister as an instrumental cause and teaches that sacramental institution ultimately belongs to God.
In Question 65 he considers why seven sacraments fittingly correspond to the needs of supernatural life.
St Thomas's analogies explaining why the number seven is fitting are theological reasoning rather than the basis of the dogma. Catholics believe there are seven fundamentally because the Church teaches that Christ instituted seven, not because a theologian found a convenient numerical analogy.
The Seven Sacraments at a Glance
The following table gives the principal elements according to traditional Catholic sacramental theology. The descriptions are necessarily abbreviated, and legitimate Eastern Catholic rites have sometimes employed outward forms differing from the Roman ceremonial while preserving the substance of the sacrament.
| Sacrament | Principal Effect or Purpose | Matter / Sacramental Sign | Form | Minister |
|---|---|---|---|---|
| Baptism | Spiritual rebirth; remission of original sin and all previously committed sin; incorporation into the Church; sacramental character | True water applied by washing | Baptism in the name of the Father, Son and Holy Ghost | Ordinarily sacred ministers; in necessity, any person capable of forming the required intention |
| Confirmation | Strengthening by the Holy Ghost; perfection of baptismal grace; sacramental character | In the traditional Roman rite, anointing with sacred chrism associated with the laying on of the hand | Prescribed words signifying the sacramental sealing and strengthening | Bishop as ordinary minister; a priest in circumstances authorised by the Church |
| Holy Eucharist | Christ Himself received as supernatural nourishment; union with Christ; increase of grace | Wheaten bread and wine of the grape | The words of consecration pronounced over the respective species | A validly ordained priest |
| Penance | Forgiveness of post-baptismal sins and reconciliation with God | The penitent's acts — contrition, confession and satisfaction — traditionally called the quasi-matter | Sacerdotal absolution | A priest possessing the requisite power of Orders and jurisdiction |
| Extreme Unction | Spiritual strengthening in serious illness; remission of sins according to the sacrament's conditions; preparation for the final struggle | Anointing with the Oil of the Sick | The prescribed prayer accompanying the sacramental anointing | Priest |
| Holy Orders | Sacred power and sacramental grace for ecclesiastical ministry; sacramental character | For diaconate, priesthood and episcopacy, the imposition of hands, as authoritatively determined by Pius XII | The essential consecratory words determining the imposition of hands and signifying the sacramental effect | Bishop |
| Matrimony | Grace sanctifying the marriage bond and assisting husband and wife in their duties and the Christian upbringing of children | The spouses' valid matrimonial consent constitutes the essential sacramental sign; exact scholastic allocation of matter/form discussed by theologians | Expressed mutual consent | The baptized spouses confer the sacrament upon one another in the Latin theological tradition; priest ordinarily acts as Church's authorised witness |
For Holy Orders, Pope Pius XII, in the Apostolic Constitution Sacramentum Ordinis (30 November 1947), authoritatively declared that the matter of the diaconate, priesthood and episcopate is the imposition of hands, with the corresponding essential consecratory words constituting the form.
Pius XII's decision is particularly instructive because it also demonstrates the distinction between the substance of a sacrament, which the Church cannot change, and ceremonies attached by ecclesiastical authority, which can in principle be altered.
Are All Seven Sacraments Necessary for Every Catholic?
No. Trent teaches that the sacraments are necessary for salvation in the manner established by God, but it expressly rejects the idea that every one of the seven is individually necessary for every person.
A person does not need to receive Holy Orders in order to be saved. Nor must everyone marry. A baptized infant obviously does not need Penance before committing personal sin. The sacraments have different purposes and therefore different forms of necessity.
Baptism occupies a unique place as the gateway to the sacramental life.
Penance is necessary for the restoration of those who, after Baptism, have fallen into mortal sin, according to the conditions established by Christ.
Holy Orders exists for the sacred ministry of the Church, while Matrimony sanctifies those called to the married state.
The detailed question of sacramental necessity should therefore not be reduced to the proposition that “everyone needs all seven.”
Sacraments and Sacramentals Are Not the Same Thing
Sacraments should also be distinguished from sacramentals. Sacraments were instituted by Christ. Sacramentals are instituted by the Church — for example, particular blessings and blessed objects — to dispose the faithful toward receiving grace and to obtain spiritual benefits through the Church's prayers.
The Church can establish new sacramentals or alter their discipline. She cannot create an eighth sacrament. That distinction helps explain why a ritual simply being ancient, holy or blessed does not make it one of the seven sacraments.
The Main Objection
“The Bible Never Gives a List of Seven Sacraments. Isn't the Number Seven a Medieval Invention?”
This objection contains an important historical observation.
The New Testament does not contain a numbered statement saying:
“There are seven sacraments: Baptism, Confirmation, Eucharist…”
Nor did the earliest Fathers always employ the term sacrament in the later restricted scholastic sense. Christian writers sometimes used words such as mysterion or sacramentum more broadly.
The exact sevenfold classification became increasingly explicit and systematic during the medieval period and was authoritatively enumerated by the Council of Florence (1439) before being solemnly defined by the Council of Trent (1547).
From a Protestant sola Scriptura standpoint, this historical development can appear to prove that seven sacraments were invented later.
Response
The objection assumes precisely the principle Catholics do not accept: that a Christian doctrine is legitimate only when the Bible contains a later theological definition stated explicitly and all at once.
Christ did not leave His Church with Scripture alone as an independently interpreted catalogue of doctrines. Divine revelation was transmitted through Sacred Scripture and Apostolic Tradition, and Christ entrusted His Church with authority to preserve, teach and define that revelation.
This principle has already been treated more fully in the FAQ articles concerning Sacred Scripture and Sacred Tradition and why the Bible alone is not sufficient as the rule of faith.
Sacramental realities themselves are already plainly present in Scripture and the ancient Church: baptismal regeneration, the laying on of hands after Baptism, the Eucharist, apostolic forgiveness of sins, anointing of the sick, sacred ordination and Christian Matrimony.
What developed was primarily the precision of terminology, classification and theological explanation.
The same distinction appears elsewhere in Christianity. The fact that the theological term Trinity acquired increasingly exact technical expression during later doctrinal controversies does not mean the Father, Son and Holy Ghost were invented by fourth-century councils.
Likewise, the Church's eventual exact enumeration and definition of the seven sacraments does not imply that medieval theologians manufactured seven new rites.
Most importantly, Catholics are not asked to accept the number seven merely because Peter Lombard or St Thomas Aquinas argued for it. The Church herself definitively taught at Trent that the seven sacraments were instituted by Christ.
The doctrine therefore rests upon the Church's divinely assisted teaching authority, receiving Scripture and Apostolic Tradition — not upon a convenient medieval classification.
Common Objections
“Aren't the Sacraments Merely Symbols of Faith?”
No. Catholicism certainly teaches that the sacraments are signs, but not that they are merely signs.
Trent explicitly rejected the proposition that the sacraments were instituted solely to nourish faith. It teaches that they truly contain and confer the grace they signify.
The water of Baptism signifies purification, but Baptism also accomplishes supernatural cleansing.
The Eucharist signifies and produces supernatural nourishment, but it is not merely a communal reminder of Christ.
Sacramental symbolism and sacramental efficacy are therefore complementary, not contradictory.
“Does a Sinful Priest Make the Sacrament Invalid?”
Not simply because he is sinful. Sacramental efficacy comes principally from Christ, not from the personal virtue of the minister. Trent therefore teaches that a minister in mortal sin can nevertheless validly confer a sacrament when he possesses what is required and observes its essentials. This does not mean that every action performed by anyone dressed as a priest is valid.
Questions remain concerning:
whether the person is a valid minister;
whether he possesses valid Holy Orders where required;
whether valid matter is used;
whether valid form is used;
whether he possesses the necessary intention;
and, for certain sacraments such as Penance, whether the jurisdiction required for validity is present.
The minister's moral worthiness and the minister's sacramental capacity are different questions.
“If the Church Can Change Ceremonies, Can She Change the Sacraments?”
The Church can regulate sacramental rites and ceremonies, but she cannot alter what belongs to the divinely established substance of the sacrament.
Pope Pius XII stated this principle explicitly in Sacramentum Ordinis. The Church could never substitute different sacraments for those Christ established, because she has no power over those elements of the sacramental sign which Christ Himself determined to be preserved.
At the same time, Pius XII noted that different rites had historically surrounded Holy Orders and that some ceremonial elements could therefore be changed by ecclesiastical authority.
This distinction is fundamental. A change is not invalid merely because it is a change. But neither can one argue that the Church has unlimited power to alter sacramental signs simply because certain ceremonies are disciplinary.
When the validity of a changed sacramental rite is questioned, the correct inquiry is:
What belongs to the substance of the sacrament, and has that substance been preserved?
That question must be examined separately for each sacrament and rite.
What We Can and Cannot Conclude
Established Catholic doctrine: There are exactly seven sacraments of the New Law: Baptism, Confirmation, the Eucharist, Penance, Extreme Unction, Holy Orders and Matrimony. All seven were instituted by Jesus Christ.
Established Catholic doctrine: The sacraments are not empty symbols. They are sensible signs which, by Christ's institution, signify and effect supernatural grace according to the nature of each sacrament.
Established Catholic doctrine: A sacramental minister must intend at least to do what the Church does.
Established Catholic doctrine: The personal state of mortal sin of an otherwise capable minister does not by itself render the sacrament invalid.
Established Catholic sacramental principle: The outward sacramental sign is traditionally understood through matter and form, although that analysis requires theological precision in sacraments such as Penance and Matrimony.
Established Catholic doctrine: Baptism, Confirmation and Holy Orders imprint a sacramental character and therefore cannot be repeated.
Authoritative pre–Vatican II teaching: The Church possesses authority over changeable sacramental rites and ceremonies but possesses no authority to replace the sacraments Christ instituted or alter their divinely established substance. Pope Pius XII states this explicitly in Sacramentum Ordinis.
Historical fact: The terminology and systematic classification of the sacraments became increasingly precise over centuries. The exact sevenfold enumeration was explicit in medieval theology, taught by Florence and definitively affirmed by Trent. This development of terminology does not by itself imply the invention of the sacramental realities.
Theological nuance: Catholic theology has not always treated every secondary question concerning the precise historical development, detailed institution or scholastic analysis of every sacrament in exactly the same way. Such questions must not be confused with the defined dogma that Christ instituted all seven.
What does not establish invalidity: A sacramental rite cannot be pronounced invalid merely because it is less beautiful, less traditional in ceremonial form, celebrated in the vernacular, poorly performed, or theologically objectionable in some secondary respect.
If invalidity is alleged, the argument must establish a defect affecting something required for validity — such as matter, form, minister, intention, subject, valid Orders, or another sacrament-specific requirement.
This distinction becomes especially important when examining twentieth-century revisions of sacramental rites. The theological quality of a rite and its sacramental validity are related questions, but they are not identical questions.
Conclusion
The seven sacraments are Baptism, Confirmation, the Holy Eucharist, Penance, Extreme Unction, Holy Orders and Matrimony.
They are outward, sensible and efficacious signs instituted by Jesus Christ to communicate supernatural grace. Their power does not arise from human emotion, symbolism or the personal holiness of the priest, but from Christ, who established them as instruments of His saving work.
Their external signs involve the sacramental realities traditionally described as matter and form. They must be conferred by a capable minister, and that minister must possess at least the intention of doing what the Church does.
Christ instituted the sacraments; the Church guards and administers them. She may regulate ceremonies belonging to their celebration, but she cannot invent new sacraments, abolish those Christ instituted, or alter their divinely established substance.
For a Catholic, therefore, sacramental theology is not an abstract exercise. Christ established these means so that souls might actually receive the supernatural life He purchased through His Passion.
The practical objective is not merely to know the names of seven sacraments, but to receive the sacraments validly, reverently and with the dispositions necessary for their supernatural fruit, so that they may accomplish their purpose: union with Christ, perseverance in grace and ultimately eternal salvation.
Primary Sources
Council of Trent (1545–1563), Session VII, Decree Concerning the Sacraments, 3 March 1547, especially Canons 1, 5–12. Council of Trent — Session VII, Sacraments
Council of Trent, Session XIV (1551), Doctrine on the Sacraments of Penance and Extreme Unction, including the institution of Extreme Unction and its scriptural foundation. Council of Trent — complete decrees and canons
Council of Florence, Decree for the Armenians, 22 November 1439, on the seven sacraments and the traditional analysis of matter, form, minister and intention. Council of Florence — Decree for the Armenians
Roman Catechism / Catechism of the Council of Trent (1566), Part II, “On the Sacraments.” Catechism of the Council of Trent — Part II
A digitised historical edition is also available here: Catechism of the Council of Trent — scanned edition
Pope St Pius X, Catechism of Christian Doctrine, section on the Sacraments, especially the nature of a sacrament, matter, form, minister and intention. Catechism of St Pius X
Pope Pius XII, Apostolic Constitution Sacramentum Ordinis, 30 November 1947, especially §§1–5, concerning the substance of the sacraments and the matter and form of Holy Orders. Sacramentum Ordinis — official Latin text
English translation: Sacramentum Ordinis — English text
St Thomas Aquinas (c. 1225–1274), Summa Theologiae, III, q.60, “What Is a Sacrament?” Summa Theologiae III, q.60
St Augustine of Hippo (AD 354–430), Tractates on the Gospel of John, Tractate 80.3, on the element and sacramental word. St Augustine — Tractate 80 on John
St Ambrose of Milan (c. AD 339–397), On the Mysteries (c. AD 387), on Baptism, Confirmation and the Eucharist. St Ambrose — On the Mysteries
Third Plenary Council of Baltimore, Baltimore Catechism, questions on the nature and number of the sacraments. Baltimore Catechism
Further Reading
St Thomas Aquinas, Summa Theologiae, III, qq.60–65. These questions provide the classical theological treatment of the nature, necessity, effects, causes and number of the sacraments.
Roman Catechism, Part II. Particularly useful because it explains sacramental theology pastorally while retaining the doctrinal precision of the Tridentine period. Roman Catechism — Part II
Catechism of St Pius X, “The Sacraments.” A concise pre–Vatican II summary of matter, form, minister, intention and sacramental grace. Catechism of St Pius X
Baltimore Catechism. Particularly useful for the concise definition of a sacrament as an outward sign instituted by Christ to give grace. Baltimore Catechism
Related Questions
What Makes a Sacrament Valid?
What Is the Difference Between Sacramental Validity and Liceity?
What Does Ex Opere Operato Mean?
Can a Heretic or a Sinful Priest Validly Administer a Sacrament?
Can the Church Change the Matter or Form of a Sacrament?
Why Do Baptism, Confirmation and Holy Orders Leave an Indelible Character?
What Is the Difference Between a Sacrament and a Sacramental?
Are the Post–Vatican II Sacramental Rites Valid?