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.
"We're all in this together."
犧牲自由以換取安全(可指生活保障)的人,不配有自由和安全。
"The unexamined life is not worth living."