Rewards and punishments are the lowest form of education.

So if loss of what gives happiness causes you distress when it fades, you can now understand that such happiness is worthless. It is said, those who lose themselves in their desire for things also lose their innate nature by being vulgar.

Being is thoughtless-beyond and beneath all categories of thought. Expression is the realization of creative thought. Being is still; expression, moving. But then if I do not strive, who will?

The hundred parts of the body are all complete in their places. Which should one prefer? Do you like them all equally? Are they all servants? Are they unable to control one another and need a ruler? Or do they become rulers and servants in turn? Is there any true ruler other than themselves?

Sorrow and happiness are the heresies of virtue; joy and anger lead astray from TAO; love and hate cause loss of virtue. The heart unconscious of sorrow and happiness - that is perfect virtue. One, without change - that is perfect repose. Without any obstruction - that is the perfection of the unconditioned. Holding no relations with the external world, - that is perfection of the negative state. Without blemish of any kind, - that is the perfection of purity.

The perfect man employs his mind as a mirror.

A battering ram can knock down a city wall, but it cannot stop a hole. Different things have different uses.