If you're not stubborn， you'll give up on experiments too soon. And if you're not flexible， you'll pound your head against the wall and you won't see a different solution to a problem you're trying to solve.

Truth needs no ornate decoration.

任何一代人最伟大的发现是，一个人可以通过改变态度来改变他的生活。

英雄是一时的，但传奇是一世的。

世界杀害最善良的人，最温和的人，最勇敢的人，不偏不倚，一律看待。