晏子春秋
世界是一个非常复杂的地方，并不总是容易理解我们周围发生的事情。
In mathematics, the art of proposing a question must be held of higher value than solving it.
Don’t be afraid to take risks—most great inventions come from bold experiments.
The ultimate measure of a man is not where he stands in moments of comfort and convenience， but where he stands at times of challenge and controversy.