材料选择艺术家,正如艺术家选择材料。
当富贵利达的人夸说他得到上帝的恩惠时,上帝却羞了。
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.