Habit is habit, and not to be flung out of the window by any man, but coaxed downstairs a step at a time.

"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."

The power of mathematics lies in its ability to abstract and generalize.

God is in the details.

科学应该对所有人开放，无论背景如何。