There are necessary conditions for happiness. These conditions are independent of the performance of the human function. Thus, even if good is the excellent performance of function, such performance is not sufficient for happiness. Moral or ethical virtue, virtue of character, is the perfection of desiring part of the psyche resulting from the rationalizing the desires by means of habituation. Intellectual virtue is the perfection of the exercise of pure rationality, theoretical and practical.
Moral virtue is handled in Bks.
If you have finished with the Textoutline for Bk. I and would like to continue, go to the Textoutline for Bk. II .