一个好的数学家是能看到定理之间类比的人;一个伟大的数学家是能看到类比之间的类比的人。
The most exciting phrase to hear in science, the one that heralds new discoveries, is not 'Eureka!' but 'That's funny...'
All businesses need to be young forever. If your customer base ages with you, you're Woolworth's.