ABSTRACT
Thomas Aquinas (b. 1225 or 1226, d. 1274) is regarded as the greatest of scholastic philosophers. In all Catholic educational institutions that teach philosophy his system has to be taught as the only right one; this has been the rule since a rescript of 1879 by Leo XIII. St Thomas, therefore, is not only of historical interest, but is a living influence, like Plato, Aristotle, Kant and Hegel-more, in fact, than the latter two. In most respects, he follows Aristotle so closely that the Stagyrite has, among Catholics, almost the authority of one of the Fathers; to criticize him in matters of pure philosophy has come to be thought almost impious.1 This was not always the case. In the time of Aquinas, the battle for Aristotle, as against Plato, still had to be fought. The influence of Aquinas secured the victory until the Renaissance; then Plato, who became better known than in the Middle Ages, again acquired supremacy in the opinion of most philosophers. In the seventeenth century, it was possible to be orthodox and a Cartesian; Malebranche, though a priest, was never censured. But in our day such freedoms are a thing of the past; Catholic ecclesiastics must accept St Thomas if they concern themselves with philosophy.
