设计应该解决问题，而不仅仅是看起来好看。
Virtually no idea is too ridiculous to be accepted, even by very intelligent and highly educated people, if it provides a way for them to feel special and important. Some confuse that feeling with idealism.
The goal of mathematics is not to solve problems, but to understand them.
创新是看到每个人都看到的东西，思考没有人想过的东西。