Sometimes the hardest thing in life is to know which bridge to cross and which to burn.

你越深入数学，就越意识到还有多少未知。

I would advise young artists to paint as they can, as long as they can, without being afraid of painting badly.

艺术的本质功能是道德的。

每个程序都是其他程序的一部分，很少适合。