You can't power a nation on wishful thinking.

"We look at the world once, in childhood. The rest is memory."

Success is not about being the biggest, but about making the biggest difference.

人们雕刻东西，如果半途而废，即使是腐烂的木头也不能刻断；如果坚持到底，即使是金属或者石头都能雕空。

观察的个体数量越多，个体的身体或道德特性就越容易被抹去，从而使社会赖以存在和保存的普遍事实占据主导地位。