Never have a companion that casts you in the shade.

Accountability in friendship is the equivalent of love without strategy.

Never make friends with people who are above or below you in status. Such friendships will never give you any happiness.

Never contract friendship with a man that is not better than thyself.

Friendship needs no words - it is solitude delivered from the anguish of loneliness.

Peace, commerce and honest friendship with all nations entangling alliances with none.

True friendship ought never to conceal what it thinks.

Men kick friendship around like a football, but it doesn't seem to crack. Women treat it like glass and it goes to pieces.

The most I can do for my friend is simply be his friend.

Caring for but never trying to own may be a further way to define friendship.