I have a riddle for you. What kind of ship never sinks?
It's true, and Aristotle agrees. He said: "Friendship... is a kind of virtue, or implies virtue, and it is also most necessary for living." Aristotle also realized that there are 3 kinds of friendship:
1) Friendship based on utility. Utility is an impermanent things: it changes according to circumstances. So with the disappearance of the ground for friendship, the friendship also breaks up, because that was what kept it alive.
2) Friendship based on pleasure. Friendship between the young is thought to be grounded on pleasure, because the lives of the young are regulated by their feelings, and their chief interest is in their own pleasure and the opportunity of the moment.
3) Perfect friendship is based on goodness. Only the friendship of those who are good, and similar in their goodness, is perfect.
What kind of friendship do we have?