Abstract

In this paper the scholastic question 'On the Subject of Virtues' is taken as starting point for a discussion of the vision of man that supports Thomas Aquinas' moral doctrine. According to Thomas not the will, but the sensualitas itself must be the subject of moral virtues. For a virtuous action the right decision and the right intention in the will do not suffice, there must also exist „a perfect disposition in the sensitive appetite to follow the judgement of reason”. If the principle of all virtues is the will, their perfection and completion is in the emotional life which makes someone act with pleasure and spontaneously. Thomas' ethical doctrine is confronted with the sharp criticism of William of Ockham. According to Ockham only dispositions of the will can be moral virtues. It is even questionable whether the sensitive faculties may acquire any habits, and certainly those habits are never intrinsically good, but only good „denominatione extrinseca”. In Ockham's view it is superfluous to postulate habitus in the irrational soul besides the corporeal qualities (which we may acquire through drugs or physical training). Ockham's vision about man is dichotomic. Morality is situated exclusively on the level of reason and will. The body with its sensitive functions is the realm of the passionate life, the indifferent material that must be ordered by the virtuous man. The ethical life is understood as a struggle, requiring will power and firmness. In this context, the difference between temperance and continence disappears. In Thomas' view the sensitive appetite is much more than a biological function, because it can be integrated in a rational desire. The relation between nature and morality is understood als 'participation'. When this metaphysics of participation is abandoned we find a rigoristic voluntarism, as is evident in Ockham