"A literatura é um espelho da sociedade, refletindo suas virtudes e seus vícios."
关爱别人因而得福的人有,而憎恶别人残害别人因而得祸的人也有啊! 
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.