数学家是能在定理之间找到类比的人；更好的数学家是能在证明之间看到类比的人；而最好的数学家是能注意到理论之间类比的人。
No man really knows about other human beings. The best he can do is to suppose that they are like himself.
It's on the strength of observation and reflection that one finds a way. So we must dig and delve unceasingly.
"Ink is my favorite language - it speaks in shadows and light."
The only way to survive is to have a sense of humor.
Complexity is the enemy of execution—keep solutions simple.
生命与死亡之间的界限，充其量不过是模糊的阴影。谁能说清它们的交界在哪里？