True friendship is like sound health the value of it is seldom known until it is lost.

Friendship is the source of the greatest pleasures, and without friends even the most agreeable pursuits become tedious.

Never have a companion that casts you in the shade.

It is only the great hearted who can be true friends. The mean and cowardly, Can never know what true friendship means.

Real friendship, like real poetry, is extremely rare - and precious as a pearl.

True friendship ought never to conceal what it thinks.

Think where man's glory most begins and ends, and say my glory was I had such friends.

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

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

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