每个圣人都有过去，每个罪人都有未来。
Every mathematical problem has a solution, but not every solution is immediately apparent.
The artist's job is to make the invisible visible.
我没有任何特别的秘诀（用于开发新的证明）……这就是为什么做研究既具有挑战性又具有吸引力的原因。这就像在丛林中迷路，试图利用你能收集到的所有知识来想出一些新的技巧，并且如果运气好的话，你可能会找到出路。
I don't have any particular recipe [for developing new proofs] ... It is the reason why doing research is challenging as well as attractive. It's like being lost in a jungle and trying to use all the knowledge that you can gather to come up with some new tricks, and with some luck you might find a way out.
名声不是生活中最重要的东西，最重要的是快乐。
战争是语言失败时发生的事情。
The greatest happiness for the laborer consists in having an abundant supply of the necessaries of life.
建筑师必须是空间的园丁。
在一个充满仇恨的世界，我们仍须勇于希望。在一个充满愤怒的世界，我们仍须勇于安慰。在一个充满绝望的世界，我们仍须勇于梦想。在一个充满猜忌的世界，我们仍须勇于相信。
