Mathematics is thought moving in the sphere of complete abstraction from any particular instance of what it is talking about.

Mathematics is thought moving in the sphere of complete abstraction from any particular instance of what it is talking about.

数学是思想在一个完全抽象的范围内运动，从它所讨论的任何一个特定的实例出发。

-- Alfred North Whitehead 阿尔弗雷德北怀特黑德