Friendship is unnecessary, like philosophy, like art... It has no survival value rather it is one of those things that give value to survival.

Be true to your work, your word, and your friend.

I value the friend who for me finds time on his calendar, but I cherish the friend who for me does not consult his calendar.

A true friend is the greatest of all blessings, and that which we take the least care of all to acquire.

I have friends in overalls whose friendship I would not swap for the favor of the kings of the world.

Success always necessitates a degree of ruthlessness. Given the choice of friendship or success, I'd probably choose success.

It is more shameful to distrust our friends than to be deceived by them.

Friendship may, and often does, grow into love, but love never subsides into friendship.

No person is your friend who demands your silence, or denies your right to grow.

Friendship... is not something you learn in school. But if you haven't learned the meaning of friendship, you really haven't learned anything.