Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.

爱是因为爱本身。爱不需要理由。

现实是：有时你会输。你永远不会因为太好而不会输。你永远不会因为太强大而不会输。你永远不会因为太聪明而不会输。这是会发生的事。

You are never too old to set another goal or to dream a new dream.

理解就是发明。