I must study politics and war that my sons may have liberty to study mathematics and philosophy.

The more you give, the more you get.

To talk about painting is not only difficult but perhaps pointless too.

生活是一段旅程，我们必须为我们遇到的意外曲折做好准备。

Mathematics is the science of patterns, and we study them to understand how things work.

I'm not going to let anyone bring me down.