粮食是百姓生存的根本，没有粮食人就无法生存。三天不吃粮食，父子之间也难以互相照顾。

Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.

So that morning in 1962 I told myself: Let everyone else call your idea crazy . . . just keep going. Don’t stop. Don’t even think about stopping until you get there, and don’t give much thought to where “there” is. Whatever comes, just don’t stop.

创新不会偶然发生，它需要纪律、专注和挑战现状的意愿。