我们都在寻找某样东西，但我们并不总是知道那是什么。
创新发生在不同观点和经验的交汇处。
I would not dare to say that there is a direct relation between mathematics and madness, but there is no doubt that great mathematicians suffer from maniacal characteristics.
The bird a nest, the spider a web, man friendship.
The sublimity of administration consists in knowing the proper degree of power that should be exerted on different occasions.