The greatest thing in life is to keep your mind young.

I don't compete with anyone but myself.

There is not much danger that real talent or goodness will be overlooked long; even if it is, the consciousness of possessing and using it well should satisfy one, and the great charm of all power is modesty.

量子密码学不依赖于数学问题的难度，而是依赖于物理学的基本定律。