Of all things that wisdom provides to help one live one’s entire life in happiness, the greatest by far is the possession of friendship.

- Epicurus

In my judgement the sweetness of well-matched and compatible fellowship can never cost too dear. O! a friend! How true is that ancient judgement, that the frequenting of one is more sweet than the element water, more necessary than the element fire.

- Montaigne

One can only flourish among people who share the identical ideas and the identical will; I have no one – that is my sickness.

- Nietzsche

Good friends give us a positive self-concept; bad acquitances detract from it.