If you know, say you know. If you don't know, say you don't know.

To be fond of learning is to draw close to wisdom. To practice with vigor is to draw close to benevolence. To know the sense of shame is to draw close to courage. He who knows these three things knows how to cultivate his own character. Knowing how to cultivate his own character, he knows how to govern other men. Knowing how to govern other men, he knows how to govern the world, its states, and its families.

The superior man understands what is right; the inferior man understands what will sell.

The man who is master of himself drinks gravely and wisely.

Before you embark on a journey of revenge, dig two graves.

Old age, believe me, is a good and pleasant thing. It is true you are gently shouldered off the stage, but then you are given such a comfortable front stall as spectator.

Learn, as if never overtaking your object, and yet as if apprehensive of losing it.