Friendship improves happiness, and abates misery, by doubling our joys, and dividing our grief

The shifts of fortune test the reliability of friends.

The reward of friendship is friendship itself.

Never injure a friend, even in jest.

Friendship is the only thing in the world concerning the usefulness of which all mankind are agreed.

Loyalty is what we seek in friendship.

Every man can tell how many goats or sheep he possesses, but not how many friends.

A friend is, as it were, a second self.

The rule of friendship means there should be mutual sympathy between them, each supplying what the other lacks and trying to benefit the other, always using friendly and sincere words.