No man, for any considerable period, can wear one face to himself and another to the multitude, without finally getting bewildered as to which may be the true.

死亡是唯一真正严肃的哲学问题。

一种善行没有内心的支持就不会长久，一种行为如果得不到自身的了解就无法树立。 

The ruling ideas of each age have ever been the ideas of its ruling class.

我不是最完美的人，但我是最真实的人。

Light is the key to understanding the world.