  Thomas Aquinas (c. 1224–74) undertook the project of synthesis between Aristotle and Christianity, though his version of Christianity was already deeply influenced by Augustine, and so by Neo-Platonism. Aquinas, like Aristotle, emphasized the ends (vegetative, animal and typically human) given to humans in the natural order. He described both the cardinal virtues and the theological virtues of faith, hope and love, but he did not feel the tension that current virtue ethicists sometimes feel between virtue and the following of rules or principles. The rules governing how we ought to live are known, some of them by revelation, some of them by ordinary natural experience and rational reflection. But Aquinas thought these rules consistent in the determination of our good, since God only requires us to do what is consistent with our own good. Aquinas's theory is eudaimonist; ‘And so the will naturally tends towards its own last end, for every man naturally wills beatitude. And from this natural willing are caused all other willings, since whatever a man wills, he wills on account of the end.’ (Summa Theologiae I, q.60. a.2) God's will is not exercised by arbitrary fiat; but what is good for some human being can be understood as fitting for this kind of agent, in relation to the purpose this agent intends to accomplish, in the real environment of the action, including other persons individually and collectively. The principles of natural moral law are the universal judgments made by right reasoning about the kinds of actions that are morally appropriate and inappropriate for human agents. They are thus, at least in principle and at a highly general level, deducible from human nature. Aquinas held that reason, in knowing these principles, is participating in the eternal law, which is in the mind of God (Summa Theologiae I, q.91. a.2). Aquinas was not initially successful in persuading the church to embrace Aristotle. In 1277 the Bishop of Paris condemned 219 propositions (not all Thomist), including the thesis that a person virtuous in Aristotle's terms ‘is sufficiently disposed for eternal happiness.’ But in the Counter-Reformation, the synthesis which Aquinas achieved became authoritative in Roman Catholic education.