Mathematics is not a careful march down a well-cleared highway, but a journey into a strange wilderness, where the explorers often get lost.

The greatest wealth is to live content with little.

I don’t care about the past, I care about the future.

你能创造的最有价值的东西就是错误——你无法从完美中学到任何东西。

The best ideas often come from listening—to farmers, scientists, and families.