Start with what is right rather than what is acceptable.
真相很残酷。一旦给狗戴上皇冠，就很难给它戴上项圈了。
The greatness of a man is not in how much wealth he acquires, but in his integrity and his ability to affect those around him positively.
The joy of mathematics comes from the moments of clarity when complex things become simple.
实现不可能的唯一方法就是相信它是可能的。
Anything you say before the word “but” does not count.