最伟大的定理往往始于简单的猜想,源于直觉。
The greatest theorems often start as simple conjectures, born out of intuition.
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。
Though the water running in the fountain be every one's, yet who can doubt, but that in the pitcher is his only who drew it out?