唯一把我们和动物区分开的是我们装饰自己的能力。
You know, in the Middle Ages, in England, when you met a very poor person, that person would be described as an "unfortunate" -- literally, somebody who had not been blessed by fortune, an unfortunate.
孤独不是缺乏陪伴，孤独是缺乏目标。
No one has ever written or painted, sculpted, modeled, built, or invented except literally to get out of hell.
Mathematics is the art of giving the same name to different things.
学习数学的最好方法就是做数学。