If people do not believe that mathematics is simple, it is only because they do not realize how complicated life is.

If people do not believe that mathematics is simple, it is only because they do not realize how complicated life is.

如果人们不相信数学是简单的，那只是因为他们没有意识到生活是多么复杂。

-- John von Neumann 约翰·冯·诺依曼