An expert is a person who has made all the mistakes that can be made in a very narrow field.

Failure is simply the universe's way of teaching you what not to do next time.

The same principles which at first view lead to skepticism， pursued to a certain point， bring men back to common sense.

在你背叛别人的那一刻，你也背叛了自己。

以客观角度来看，这个世界确实变得更好，但同时也变得更糟。前进一步，又倒退一步，仿佛宇宙在科技进步和文化倒退间达成平衡，使人类的进展呈钟形曲线。

心灵是将挑战转化为机会的系统。