Aquinas on Transubstantiation treats one of the most frequently mis-understood and mis-represented teachings of Thomas Aquinas-Eucharistic transubstantiation. The study interprets Aquinas's teaching as an exercise of "holy teaching" (sacra doctrina) that intends to show theologically and back up philosophically the simple yet profound thesis that "transubstantiation" affirms nothing but the truth of Christ's words at the Last Supper-"This is my body,"...