宇宙、天地，有它自然的运行规律，是持久不变的，不会以人的意志为转移，它既不会因为有像尧那样的仁德君主而存在，也不会因为有像夏桀那样残暴的君主而消失。顺应自然规律来治理国家，就会获得吉祥；如果违背自然规律，就会招来灾难。

The only real failure in life is not to be true to the best one knows.

Sometimes when you innovate, you make mistakes. It is best to admit them quickly, and get on with improving your other innovations.

It is the duty of a student to get everything out of a teacher， and the duty of a teacher to get everything out of a student.

你的时间有限，不要浪费在过别人的生活上。