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

They who know the truth are not equal to those who love it, and they who love it are not equal to those who delight in it.

Gravity is only the bark of wisdom's tree, but it preserves it.

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.

Do not wish for quick results, nor look for small advantages. If you seek quick results, you will not reach the ultimate goal. If you are led astray by small advantages, you will never accomplish great things.

When a man's knowledge is sufficient to attain, and his virtue is not sufficient to enable him to hold, whatever he may have gained, he will lose again.

Don't curse the darkness, light a candle.