Be slow to fall into friendship, but when you are in, continue firm and constant.

There is no possession more valuable than a good and faithful friend.

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

There is some self-interest behind every friendship. There is no friendship without self-interests. This is a bitter truth

The beauty of enmity is insecurity; the beauty of friendship is in security.

In friendship, as in love, we are often happier through our ignorance than our knowledge.