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

When anger rises, think of the consequences.

The hardest thing of all is to find a black cat in a dark room, especially if there is no cat.

If I am walking with two other men, each of them will serve as my teacher. I will pick out the good points of the one and imitate them, and the bad points of the other and correct them in myself.

We should keep the dead before our eyes, and honor them as though still living.

The man who moves a mountain begins by carrying away small stones.