生活是绘画,不是做算术。
我总是尝试做一些不同的事情,一些能挑战我的事情。
容易得到的东西,是靠不住的;轻易许下的诺言,不值得信赖。
The most beautiful as well as the most ugly inclinations of man are not part of a fixed biologically given nature, but result from the social process which creates man.