Every mathematical problem is a window into a new world of understanding.

You don't learn to walk by following rules. You learn by doing, and by falling over.

每一次接触都会留下痕迹。

理解电子就是理解我们技术文明的基础。

Truth is what stands the test of experience.

"Books are the keys to the universe."

The truth is rarely pure and never simple.

The true genius shudders at incompleteness — and usually prefers silence to saying something which is not everything it ought to be.