我对人类的状况感兴趣,对活着的意义感兴趣,对存在的本质感兴趣。
永远不要停止学习,一旦停止,你就会落后。
就好像让人伏在剑刃上,而期望他能长寿一样。 
The trouble with most people is that they think with their hopes or fears or wishes rather than with their minds.