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.

Birth is not the beginning, Death is not the end.

Big? Sure. But, he can't catch mice! So for your big tree. No use? Then plant it in the wasteland - in emptiness. Walk idly around it and rest under it's shadow. No axe or saw prepares its end. No one will ever cut it down. Useless? You should worry!.

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

All existing things are really one. We regard those that are beautiful and rare as valuable, and those that are ugly as foul and rotten. The foul and rotten may come to be transformed into what is rare and valuable, and the rare and valuable into what is foul and rotten.

The perfect man employs his mind as a mirror.

Although things seem to be sometimes going up and sometimes descending, sometimes slipping away, nevertheless there is a reality, the same today as in the past. It does not change, for nothing can affect it. Could we not say it is one great harmony? So why shouldn't we ask about it.