饥饿和贫困是世界上许多动荡和苦难的根本原因。

The best way to predict the future is to invent it.

最深刻的发现往往来自最简单的问题。

The whole conviction of my life now rests upon the belief that loneliness, far from being a rare and curious phenomenon, peculiar to myself and to a few other solitary men, is the central and inevitable fact of human existence.

勇气是所有美德中最重要的，因为没有勇气，你就无法始终如一地实践其他美德。