The person who tries to live alone will not succeed as a human being. His heart withers if it does not answer another heart. His mind shrinks away if he hears only the echoes of his own thoughts and finds no other inspiration.

最伟大的定理往往始于简单的猜想，源于直觉。

It is the duty of a student to get everything out of a teacher， and the duty of a teacher to get everything out of a student.

发现的旅程不是一条直路，而是一条充满惊喜和启示的曲折道路。