我们都被自己的记忆所囚禁，而自由的关键在于理解它们。
"We are all prisoners of our own memories, and the key to freedom lies in understanding them."
The best way to predict the future is to create it.
真正的森林管理意味着为后来者留下一些树木——以及一些利润。
He who refuses to do arithmetic is doomed to talk nonsense.
I think that the thing that makes mathematics worthwhile is the fact that it has this incredible structure that you can explore and discover.