There are three methods to gaining wisdom. The first is reflection, which is the highest. The second is limitation, which is the easiest. The third is experience, which is the bitterest.

Success depends upon previous preparation, and without such preparation there is sure to be failure.

If you look into your own heart, and you find nothing wrong there, what is there to worry about? What is there to fear?

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

Never contract friendship with a man that is not better than thyself.