战争是人类终极的戏剧，在这里人性最好和最坏的一面都被展现出来。

The most elegant proofs are those that reveal the heart of the problem with clarity.

Psychological truth is what works in the practical world.

"The true measure of a society’s progress is how it treats its most vulnerable members."

世界会打击每一个人，但经历过后，许多人会在受伤的地方变得更坚强。

We don't stop playing because we grow old; we grow old because we stop playing.