挑战是伪装的机会——拥抱它们。
Challenges are opportunities in disguise—embrace them.
The Government of the United States is a definite Government, confined to specified objects. It is not like the state governments, whose powers are more general.
否认进化史就是否认我们自己。
Simplicity has a way of improving performance by enabling us to better understand what we are doing.
最深刻的发现往往来自于提出最简单的问题。