The art of algorithm design is not just in solving problems, but in discovering new ways to think about them.
世界就是它本来的样子；那些什么都不是的人，那些允许自己变得什么都不是的人，在这个世界上没有立足之地。
The anarchic nature of the international system forces states to compete for power.
The person who tries to live alone will not succeed as a human being. His heart withers if it does not answer another heart. His mind shrinks away if he hears only the echoes of his own thoughts and finds no other inspiration.
Science is not just a collection of facts; it is a way of thinking.