"With a library you are free, not confined by temporary political climates. It is the most democratic of institutions because no one—but no one at all—can tell you what to read and when and how."

The moment eternal—just that and nothing more.

The joy of solving a mathematical problem is unparalleled; it is a moment of pure intellectual triumph.

I cannot live without books.

"The only thing that is truly beautiful is the soul."

要成功，仅靠计划是不够的。还必须即兴发挥。