Herbert McCabe taught in many ways, not least per viam provocationis. One day in the mid 1970s he provoked something far beyond his intentions with a throwaway remark about Summa theologiae I, q. 15, the question on ‘ideas’. ‘It must have been written by Saint Thomas on a platonic off day’, he declared, a comment that remained with the present writer to stimulate research in directions that might not have overly pleased Herbert. ‘Platonic’ and ‘platonist’ were not usually good words in his vocabulary, profoundly impressed as he was by Thomas’s achievement in developing Christian theology in radically new ways using the works of Aristotle, Plato’s brightest student and critic.
Thomas Aquinas himself, though, at the midpoint of his career, was convinced that the Platonists, in what they had to say about the first principle of things, were exactly right (verissima) and completely in harmony with Christian faith ‘. In fact, in a brief but potent contribution to the 1974 Thomistic Congress for the seventh centenary of Saint Thomas’s death, Andre von Ivanka asserted that as regards ‘good’, and because of the ontology supporting his understanding of it, Thomas not only ‘platonises’ but formally contradicts Aristotle. Where Aristotle argues that ‘good is not a general term corresponding to a single idea’ (.Nicomachean Ethics 1.6, 1096b25) Thomas says that ‘all things, in seeking their proper perfections, seek God himself, insofar as the perfections of all things are reflections (similitudines) of the divine being’ (Summa Theologiae I 6, 1 ad 2). Elsewhere Thomas says that ‘all things seek, as their ultimate end, to be united with God’ (Summa Contra Gentiles III. 19).