最深刻的定理往往源于最简单的观察。
The deepest theorems often arise from the simplest observations.
The mind once enlightened cannot again become dark.
成功的道路是采取大规模、坚定的行动。
我在这里是为了给世界带来欢乐,并帮助全世界的儿童。
A good abstraction is one that emphasizes the important details and suppresses the unimportant ones.