Abstract

The body of Christ is the focus of a range of questions posed to St. Thomas Aquinas by the audiences at the quodlibetal disputations over which he presided at the University of Paris. These questions arise from reflection on the Catholic faith, which holds that the body of Christ is given to us as spiritual food in the sacrament of the altar, the Eucharist. In response to questions about the Eucharist, Aquinas tries to explain how Christ’s body could come to be present in the sacrament by the bread becoming Christ’s body, arguing that by God’s power the substance of Christ’s body can come to be present under the attributes of bread, which can continue to exist without being the attributes of anything. Yet why must this be the answer? Why can’t Christ’s body come to be present with the bread, for instance? Aquinas insists that the bread and Christ’s body never exist together, but he allows that Christ’s glorified body can be with another body in the same place. So, why not in the Eucharist? Or why can’t Christ assume the bread, as he assumed a human nature, thereby making it his body? It might seem unfitting for Christ to have such a non-rational nature, yet that is exactly what Aquinas thinks happened while Christ’s body lay in the tomb. So, why not in the Eucharist? This paper attempts to explain why not. Examining the full range of questions posed to Aquinas about the body of Christ reveals a number of principles that together seem to imply that nothing less than the full transubstantiation of bread into Christ’s body is possible if Christ’s body is to become really present in the Eucharist.