"The truth is often ugly, but it must be told."

I'm trying to grow up and not let things get to me

The true spirit of delight, the exaltation, the sense of being more than Man, which is the touchstone of the highest excellence, is to be found in mathematics as surely as in poetry.

最重要的是不要失去信心。

The world is changing, and we must change with it.

经济发展必须与环境保护相协调。