Those who follow the Tao are of clear mind. They do not load their mind with anxieties and are flexible in their adjustment to external conditions.

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

Paraphrased: When Chuang Tzu was about to die, his disciples began planning a splendid funeral. However some disciples expressed concern that given a particular arrangement, birds and kites would eat his remains. Chuang Tzu replied, "Well, above ground I shall be eaten by crows and kites, below it by ants and worms. What do you have against birds?

To be constant is to be useful. To be useful is to realize one's true nature. Realization of one's true nature is happiness. When one reaches happiness, one is close to perfection.

The mind remains undetermined in the great Void. Here the highest knowledge is unbounded. That which gives things their thusness cannot be delimited by things. So when we speak of 'limits', we remain confined to limited things. The limit of the unlimited is called 'fullness.' The limitlessness of the limited is called 'emptiness.' Tao is the source of both. But it is itself neither fullness nor emptiness

A man who knows he is a fool is not a great fool.

If a man is crossing the river and an empty boat collides with his skiff, even though he is a bad tempered man he will not become very angry. But if he sees a man in the other boat he will scream and shout and curse at the man to steer clear. If you can empty your own boat crossing the river of the world, no one will oppose you, no one will seek to harm you. Thus is the perfect man - his boat is empty.