最危险的毒药是成就感。解药是每天早上都像个初学者一样思考。

The state of nature has a law of nature to govern it, which obliges every one: and reason, which is that law, teaches all mankind, who will but consult it, that being all equal and independent, no one ought to harm another in his life, health, liberty, or possessions.

不学习历史的人注定要重复错误。