贫而无怨，难；富而无骄，易。
【译文】贫穷而没有怨恨很难，富裕而不骄狂是容易的。
The minimum content of natural law is necessary for any legal system.
I think the best way to predict the future is to create it.
The only way to tell the truth is to speak with kindness. Only the words of a loving man can be heard.
理论的秘密在于，真理并不存在。