世界是一个舞台，但角色分配得很糟糕。

Every problem in mathematics is a puzzle waiting to be solved, and the joy is in the solving.

Much of what sophisticates loftily refer to as the "complexity of the real world” is in fact the inconsistency in their own minds.

我们不是汽车的制造者，我们是制造汽车的人的制造者。