Not to mend one's ways when one has erred is to err indeed.

Listen much, keep silent when in doubt, and always take heed of the tongue; thou wilt make few mistakes. See much, beware of pitfalls, and always give heed to thy walk; thou wilt have little to rue. If thy words are seldom wrong, thy deeds leave little to rue, pay will follow.

If you did not do so for the sake of riches,You must have done so for the sake of novelty.

Does Heaven ever speak? The four seasons come and go, and all creatures thrive and grow. Does Heaven ever speak!

The strongest memory is not as strong as the weakest ink.

Study without reflection is a waste of time; reflection without study is dangerous.

These are the four abuses: desire to succeed in order to make oneself famous; taking credit for the labors of others; refusal to correct one's errors despite advice; refusal to change one's ideas despite warnings.