数学中最重要的技能是提出正确问题的能力。

Never, never and never again shall it be that this beautiful land will again experience the oppression of one by another and suffer the indignity of being the skunk of the world.Let freedom reign!

I'm a control freak. I admit it.

To understand psychology, observe behavior in its natural context.

善是无法定义的。

不是地方造就人，而是人造就地方。