A mathematician is a person who can find analogies between theorems; a better mathematician is one who can see analogies between theories and the best mathematician can notice analogies between analogies.
Knowledge is only useful if it’s applied.
动作从不撒谎。
如果你认为一个人的本质是好的，就要随时为这个人提供帮助，即使其他人都离他而去。任何人都可能陷入困境。在别人需要的时候，一个偶然的善意行为就会改变他的生命轨迹，造就意想不到的友谊或忠诚。
世界可能是卑鄙的，但人们不必如此，如果他们拒绝的话。
It is better by noble boldness to run the risk of being subject to half of the evils we anticipate than to remain in cowardly listlessness for fear of what might happen.