A friend in need is a friend to be avoided.
~ Lord Samuel

Whenever a friend suceeds, a little something in me dies.
~ Gore Vidal

I'll keep it short and sweet. family. religion. friendship. these are the three demons you must slay if you wish to succeed in business.
~ Mongomery Burns (The Simpsons)

A friend in power is a friend lost.
~ Henry Adams

I've noticed your hostility towards him ... I ought to have guessed you were friends.
~ Malcom Bradbury

I don't trust him. We're friends.
~ Bertolt Brecht

Whoever says Friendship is easy has obviously never had a true friend!
~ Bronwyn Polson

There is nothing in the world I wouldn't do for (Bob) Hope, and there is nothing he wouldn't do for me ... We spend our lives doing nothing for each other.
~ Bing Crosby

A woman can become a man's friend only in the following stages - first an acquantaince, next a mistress, and only then a friend.
~ Anton Chekhov