When you have faults, do not fear to abandon them.

When we see men of worth, we should think of equaling them; when we see men of a contrary character, we should turn inwards and examine ourselves.

When you know a thing, to hold that you know it; and when you do not know a thing, to allow that you do not know it - this is knowledge.

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.