Aristotle and Virtue Ethics. Everything aims at some end—has some purpose Ethics requires that we discover what the purpose or end of human life is. There are lots of things that people pursue, but most of these are pursued for the sake of something else.
Aristotle argues by analogy: We allow that professions have functions (coblers, blacksmiths etc) and also that parts of the human body have a function (eyes, heart, ears etc)
So if human beings are like these things, we should assume that human beings also have a function
One can perform their rational function well, or not so so well.
To perform something well is to be virtuous
Intellectual virtue is had by the philosopher, who lives a life of contemplation