最难的事情是变得简单。
The most difficult thing is to be simple.
对我们森林的最大威胁不是斧头，而是冷漠。
I would say that in the long run probably Communist China is likely to be in more of an expansionist phase than Soviet Russia...In their tactics, the Chinese Communists are probably the greater menace;
The truth is, I don't know what I would have done without mathematics.
最好的投资是那些能够建立伟大公司的人。