If you think about something at three o'clock in the morning and then again at noon the next day, you get different answers...
数学不仅仅是关于数字、方程、计算或算法：它是关于理解的。
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 historian must be a poet, not to create, but to recreate.
I'm very proud to be black, but black is not all I am. That's my cultural historical background, my genetic makeup, but it's not all of who I am nor is it the basis from which I answer every question.