When people do not ignore what they should ignore, but ignore what they should not ignore, this is known as ignorance.

The sound of water says what I think.

Study is to study what cannot be studied. Undertaking means undertaking what cannot be undertaken. Philosophizing is to philosophize about what cannot be philosophized about. Knowing that knowing is unknowable is true perfection.

To exercise no-thought and rest in nothing is the first step toward resting in Tao. To start from nowhere and follow no road is the first step toward attaining Tao.

The fish trap exists because of the fish. Once you've gotten the fish you can forget the trap. The rabbit snare exists because of the rabbit. Once you've gotten the rabbit, you can forget the snare. Words exist because of meaning. Once you've gotten the meaning, you can forget the words. Where can I find a man who has forgotten words so I can talk with him?

Men do not mirror themselves in running water - they mirror themselves in still water. Only what is still can still the stillness of other things.

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