态度决定一切。

In the actual world， a very great deal of the evil that is done does not spring from evil motives.

"I think it should be called a lie because a pig is not like a day and people do not have skeletons in their cupboards."

一个好的数学家是能看到定理之间类比关系的人。一个伟大的数学家是能看到类比关系之间的类比关系的人。