The Eucharistic Presence

What it is, and where the terms in play came from by Francis Beckwith. Excerpts follow.

...Catholicism holds that bread and wine literally become the body and blood of Christ when they are consecrated by the priest celebrating the Mass. Oftentimes non-Catholics get hung up on the term, the name for the philosophical theory that the Church maintains best accounts for the change at consecration. The Church’s explanation of transubstantiation was influenced by Aristotle’s distinction between substance and accident.

Aristotle (384-322 B.C.), like most philosophers of his time, wanted to account for how things change and yet remain the same. So, for example, a “substance” like an oak tree remains the same while undergoing “accidental” changes. It begins as an acorn and eventually develops roots, a trunk, branches, and leaves. During all these changes, the oak tree remains identical to itself. Its leaves change from green to red and brown, and eventually fall off. But these accidental changes occur while the substance of the tree remains.


On the other hand, if we chopped down the tree and turned into a desk, that would be a substantial change, since the tree would literally cease to be and its parts would be turned into something else, a desk. According to the Church, when the bread and wine become the body and blood of Christ, the accidents of the bread and wine do not change, but the substance of each changes. So, it looks, tastes, feels, and smells like bread and wine, but it literally has been changed into the body and blood of Christ. That’s transubstantiation.

There are several reasons why it would be a mistake to dismiss transubstantiation simply because of the influence of Aristotle on its formulation. First, Eastern Churches in communion with the Catholic Church rarely employ this Aristotelian language, and yet the Church considers their celebration of the Eucharist perfectly valid. Second, the Catholic Church maintains that the divine liturgies celebrated in the Eastern Churches not in communion with Rome (commonly called “Eastern Orthodoxy”) are perfectly valid as well, even though the Eastern Orthodox rarely employ the term transubstantiation. Third, the belief that the bread and wine are literally transformed into Christ’s body and blood predates Aristotle’s influence on the Church’s theology by over 1000 years. For it was not until the thirteenth century, and the ascendancy of St. Thomas Aquinas’ thought, that Aristotle’s categories were employed by the Church in its account of the Eucharist. In fact, when the Fourth Lateran Council (1215) employed the language of substantial change, St. Thomas had not even been born!...