A journey is a person in itself; no two are alike. And all plans, safeguards, policing, and coercion are fruitless. We find after years of struggle that we do not take a trip; a trip takes us.

Mathematics is the poetry of logical ideas.

当你停下来思考你是否爱一个人时，你已经永远停止爱那个人了。

恐惧是迷信的根源，也是造成残忍的主要原因之一。 智慧始于征服恐惧。

成功是一段旅程，而不是终点，每一步都很重要。