Never try to discourage thinking, for you are sure to succeed.
数学的研究就像空气或重力——它无处不在,你看不到它,但你知道它在那里。
Failure is interesting—it’s part of making progress. You never learn from success, but you do learn from failure.
名誉是一件无聊的骗人的东西;得到它的人未必有什么功德,失去它的人也未必有什么过失。