Darkness cannot drive out darkness； only light can do that.Hate cannot drive out hate； only love can do that.
战略就是让自己在竞争中脱颖而出。这并不是要在你所做的事情上做得更好——而是在你所做的事情上与众不同。
活力和毅力能战胜一切。
思想，在理解和想象的程度上，都是被动的。
The duty of man is the same in respect to his own nature as in respect to the nature of all other things.
Tolerance becomes a crime when applied to evil.
In the realm of mathematics, every problem is an opportunity to discover something new and profound.
在数学的领域里，每一个问题都是发现新事物和深刻见解的机会。