聪明智慧的人，要保持着敦厚拙朴的态度，不可锋芒毕露；功高盖世的人，要保持着谦虚礼让的态度，不可居功自傲。勇猛无敌的人，要保持着小心谨慎的态度，不可无所忌惮；拥有巨财的人，要保持着如有不足的态度，不可张狂放肆。

The theory of probabilities is at bottom nothing but common sense reduced to calculus.

The best architecture is both humble and heroic.

When I am abroad， I always make it a rule never to criticize or attack the government of my own country。 I make up for lost time when I come home.

Geometry is knowledge of the eternally existent.