数学家是能在定理间找到类比的人；更好的数学家能在理论间看到类比；而最优秀的数学家能注意到类比之间的类比。

Technological innovation is the fundamental way to solve the problems of the coal industry.

故事是我们理解自己生活的方式。

The only limit to our realization of tomorrow is our doubts of today.

The will is the central organizing force of mental life.

"The most powerful stories are often the simplest."

Short-term gains should never compromise long-term sustainability.