书籍是镜子：你只能在其中看到你内心已有的东西。
The footsteps of Nature are to be traced, not only in her ordinary course, but when she deviates from it in her most extravagant excursions.
数学直觉常常指导算法的发展，但确保其正确性和效率的是严格的证明。
"And this I believe: that the free, exploring mind of the individual human is the most valuable thing in the world. And this I would fight for: the freedom of the mind to take any direction it wishes, undirected."
Always plan for the worst-case scenario.
梦想是生命的动力。