 The philosophical positions in ethics and politics (including law) that are explored in this article belong to categories (i) and (ii). The moral and political norms stated, for example, in the biblical Decalogue are, in Aquinas’ view, all knowable independently of that revelation, which confirms and perhaps clarifies them. But the propositions that he holds about what the true last end or ultimate destiny of human beings actually is belong to category (iii) and cannot be affirmed on any philosophical basis, even though philosophy, he thinks, can demonstrate that they are neither incoherent nor contrary to any proposition which philosophy shows must be affirmed.