If you devote your life to seeking revenge, first dig two graves.

The gentleman desires to be halting in speech but quick in action.

Study as if you have not reached your goal - hold it as if you were afraid of losing what you have.

Only one who bursts with enthusiasm do I instruct; Only one who bubbles with excitement do I enlighten. If I hold up one corner and you do not come back to me with the other three, I do not continue the lesson.

Man shoot at nothing, sure to hit it.

Shall I tell you what knowledge is? It is to know both what one knows and what one does not know.

The highest kind of man is the one who does before talking and practices what he professes.