How well you treat the wicked people, they don't give up their wickedness. They derive pleasure in hurting others. A serpent made to drink milk, it ejects poison only.

Respectfulness, without the rules of propriety, becomes laborious bustle; carefulness, without the rules of propriety, becomes timidity; boldness, without the rules of propriety, becomes insubordination; straightforwardness, without the rules of propriety, becomes rudeness.

A bitter thing cannot be made sweet. The taste of anything can be changed. But poison cannot be changed into nectar.

There is poison in the fang of the serpent, in the mouth of the fly and in the sting of a scorpion; but the wicked man is saturated with it.

The difference between real material poison and intellectual poison is that most material poison is disgusting to the taste, but intellectual poison, which takes the form of cheap newspapers or bad books, can unfortunately sometimes be attractive.

Good behavior wins even an enemy.