The fish trap exists because of the fish: once you have gotten the meanings, you can forget the words.

We cling to our own point of view, as though everything depended on it. Yet our opinions have no permanence; like autumn and winter, they gradually pass away.

The greatest tragedy that can befall a person is the atrophy of his mind.

Words exist because of meaning; once you’ve gotten the meaning, you can forget the words.

Therefore, the truly great man, although he does not injure others, does not credit himself with charity and mercy (these are natural to him). He does not seek gain, but does not despise his followers who do. He struggles not for wealth, but does not take credit for leaving it alone... The ranks and emoluments of the world are to him no cause for joy, it's punishments and shame no cause for disgrace.

To examine oneself makes good use of sight.

When I talk about having good hearing, I don't mean just listening, but listening to yourself. When I talk about good eyesight, I don't mean just looking, but looking at yourself.