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。

All men have the stars， but they are not the same things for different people。 For some， who are travelers， the stars are guides。 For others they are no more than little lights in the sky。 For others， who are scholars， they are problems。 For my businessman they were wealth。 But all these stars are silent。 You – you alone – will have the stars as no one else has them.

死亡疾于风，它带走的一切将一去不返。