If there is existence, there must be non-existence. And if there was a time when nothing existed, there must have been a time before that - when even nothing did not exist. Suddenly, when nothing came into existence, could one really say whether it belonged to the category of existence or non-existence?

Standards are different for all things, so the standard set by man is by no means the only 'certain' standard. If you mistake what is relative for something certain, you have strayed far from the ultimate truth.

All the fish needs is to get lost in the water. All man needs is to get lost in Tao.

He who regards all things as one is a companion of Nature.

Great wisdom is generous; petty wisdom is contentious. Great speech is impassioned, small speech cantankerous.

I do not know whether I was then a man dreaming I was a butterfly, or whether I am now a butterfly dreaming I am a man.

He who knows he is a fool is not the biggest fool; He who knows he is confused is not in the worst confusion.