Transubstantiation in Thomism
| Controlling authority | Lateran IV; Trent Session XIII; Catechism 1373–1377 |
|---|---|
| Status | The conversion named transubstantiation is dogma; the remaining accidents without a subject and related details are Thomistic synthesis |
| School | Thomism |
| Branch | Sacramental theology |
Transubstantiation in Thomism is Aquinas's metaphysical analysis of the defined Eucharistic conversion: the whole substance of bread and wine is converted into the substance of Christ's Body and Blood, while the accidents remain without their connatural subject.[1][2]
Defined conversion, school metaphysics
The article Transubstantiation states the dogma. This article states the Thomistic how, within that dogma. Lateran IV and Trent teach that the bread is transubstantiated into the Body and the wine into the Blood, the appearances remaining. The Catechism repeats that the change is aptly called transubstantiation. The Church did not define Aristotle. She defined a total conversion of what the gifts are.[3]
Aquinas's ST III qq.75–77 is the primary analysis. The conversion is not a local motion of Christ into the bread, not the annihilation of bread followed by a fresh creation of the Body, and not the remaining of bread's substance beside Christ's. It is a unique conversion of the whole substance into the whole substance of the already existing Body, present sacramentally. That uniqueness is the heart of the synthesis.
No remaining common matter
Natural substantial change keeps Prime Matter as a common subject of successive forms. Eucharistic conversion does not. If bread's matter remained, bread would remain. The whole substance passes into the term. This is why the change is not generation in the ordinary sense. The tool of Matter and Form is used, then deliberately shown to be insufficient without a special divine action.
Accidents without a subject
After consecration the sensible features remain: quantity, color, taste, and chemical behavior. They are real. In natural philosophy accidents inhere in a substance. Here their connatural substance is gone. Aquinas holds that God conserves the accidents in being, with dimensive quantity as the immediate subject of the other remaining accidents. That is the famous Thomistic solution. It is theology, not a defined laboratory report.[4]
Substance and Accident language is therefore both necessary and analogically stretched. Necessary, because the dogma says substance is converted and appearances remain. Stretched, because the remaining accidents do not inhere in Christ's Body as in a natural subject, nor in remaining bread. Mockery that 'Catholics believe in accidents without a bicycle' is a category mistake. Adoration that imagines visible flesh under the microscope is another.
Mode of presence and the whole Christ
Christ is present whole and entire under each species and under every part, by the force of the conversion as to the Body under bread and the Blood under wine, and by natural concomitance as to the soul, the divinity, and the other element. That is Tridentine and catechetical doctrine. Aquinas's explanation of presence per modum substantiae, not as a body in a place by its own dimensions, is the school account of how a true Body is present without crowding the tabernacle as a container of a tall man.[5]
Instrumental Causality of the Sacraments explains the consecration as Christ's act through the minister and the words. The words are the form of the instrument. They do not describe a feeling. They effect what they signify, because the principal agent is God. The minister's holiness is not the engine. The Church's intention, applied by the minister, is.[6]
Status
Dogma: real presence by conversion of the whole substance; appearances remain; the whole Christ under either species; adoration due. Synthesis: accidents conserved without a subject; denial of remaining common matter; presence in the manner of substance; many replies to medieval objections. Other Catholic explanations of the mode must still confess the defined conversion. They may not evacuate it into symbolism.
This Thomistic synthesis is the Church's most exact traditional servant of the dogma, commended without being itself the definition. Preach the mystery. Use the school where it helps. Do not tell the faithful that salvation hangs on mastering dimensive quantity. Do not tell them that the term transubstantiation is an optional medieval mood. The first would invent a magisterium. The second would betray one.
References
- Back to citation Fourth Lateran Council, Firmiter credimus — Conciliar confession of the one Creator, the Creator-creature distinction, the greater unlikeness in every likeness, and transubstantiation of the Eucharistic gifts.
- Back to citation Thomas Aquinas, Summa theologiae III, questions 75–77 — Primary metaphysical analysis of Eucharistic conversion, the remaining accidents without a subject, and the mode of Christ's sacramental presence.
- Back to citation Catechism of the Catholic Church, 1373–1381 — Authoritative teaching of the real presence, transubstantiation, the remaining appearances of bread and wine, and adoration of Christ in the sacrament.
- Back to citation Leo XIII, Aeterni Patris — Encyclical restoring Christian philosophy in the school of Thomas Aquinas while distinguishing that commendation from a definition of every Thomistic thesis.
- Back to citation Council of Trent, Session XIII, Decree on the Eucharist — Tridentine definition of the real presence, the fittingness of the term transubstantiation, and the conversion of the whole substance of bread and wine.
- Back to citation Thomas Aquinas, Summa theologiae III, questions 62–64 — Primary account of sacramental causality, the sacraments as separated instruments of Christ's humanity, and the necessity of the minister's intention.