最高的知识是对自我的认知。
The highest knowledge is the knowledge of the self.
There is danger from all men. The only maxim of a free government ought to be to trust no man living with power to endanger the public liberty.
沉默不是声音的缺失,而是更深层事物的存在。
实践可以包含认识,但认识不能代替实践。
It's survival of the fittest.
科学的进步不是一条直线,而是一系列曲折,常常需要回溯步骤以获得更好的立足点。