世界上充满了显而易见的事情，却没有人注意到。
The world is full of obvious things which nobody by any chance ever observes.
But who prays for Satan? Who, in eighteencenturies, has had the common humanity to pray for the one sinner that needed it most?（From Jane Lampton Clemens）
A good mathematician is lazy, but in a constructive way.
让我告诉你引导我达到目标的秘密。我的力量仅在于我的坚韧。
Without rules, there can be no true art.