Friendship is delicate as a glass, once broken it can be fixed but there will always be cracks.
Friendship is unnecessary, like philosophy, like art... It has no survival value; rather it is one of those things that give value to survival.
Friendship marks a life even more deeply than love. Love risks degenerating into obsession; friendship is never anything but sharing.
A friend is someone who knows the song in your heart and can sing it back to you even if you've forgotten the words.
Friendship is the only thing in the world concerning the usefulness of which all mankind are agreed.
Friendship is the source of the greatest pleasures, and without friends even the most agreeable pursuits become tedious.
Friendship is born at that moment when one person says to another, 'What! You too? I thought I was the only one.'
A true friend is the greatest of all blessings, and that which we take the least care of all to acquire.