The world is a place of the living, and the dead have no place in it. The dead are nothing. They are not even a memory. They are forgotten. And the living, too, will be forgotten.

数学不仅仅是关于数字、方程、计算或算法：它是关于理解的。

My mother was an atheist. She used to say that there was good news and bad news about hell. The good news is, hell is just the product of a morbid human imagination. The bad news is, whatever humans can imagine, they can usually create.

成功的关键是专注于目标，而不是障碍。

只有在梦想中，人才能真正自由，从来如此也将永远如此。