A proof of a proposition is a process the nature of which is such as to produce in us a belief in that proposition.

世界是一个舞台，我们都在扮演自己的角色。

A long habit of not thinking a thing wrong, gives it a superficial appearance of being right.

"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."

这个世界是个美好的地方，值得为之奋斗。