We secure our friends not by accepting favors but by doing them.
In wealth many friends in poverty, not even relatives.
Understand that friends come and go, but with a precious few you should hold on. The older you get, the more you need the people who knew you when you were young.
Your friends praise your abilities to the skies, submit to you in argument, and seem to have the greatest deference for you but, though they may ask it, you never find them following your advice upon their own affairs nor allowing you to manage your own, without thinking that you should follow theirs. Thus, in fact, they all think themselves wiser than you, whatever they may say.
Each has his past shut in him like the leaves of a book known to him by heart and his friends can only read the title.
Old friends become bitter enemies on a sudden for toys and small offenses.
A book is a friend a good book is a good friend. It will talk to you when you want it to talk, and it will keep still when you want it to keep still and there are not many friends who know enough to do that.
We learn our virtues from our friends who love us; our faults from the enemy who hates us. We cannot easily discover our real character from a friend. He is a mirror, on which the warmth of our breath impedes the clearness of the reflection.