True creativity comes from limitations, not from unlimited possibilities.
真正的创造力来自限制，而不是无限的可能性。
A purpose of human life, no matter who is controlling it, is to love whoever is around to be loved.
Success is not final, failure is not fatal: it is the courage to continue that counts.
The value or worth of a man is, as of all other things, his price; that is to say, so much as would be given for the use of his power.
假定任何人因为任何原因向你索要账户信息的做法都是想要欺骗你，除非他们被证明是无辜的。证明无辜的方法是给他们回电，或者使用你的（而不是他们提供）号码或网站来登陆自己的帐号。不要在他们联系你的电话、消息或邮件中暴露任何个人信息。你必须控制途径。
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.