孔子说：“我曾整天不吃、整夜不睡，来思考。结果没好处，还不如学习。”

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

Don’t wait for the perfect moment. Take the moment and make it perfect.

如果你认为你理解了量子力学，那么你并没有真正理解量子力学。