"We look at the world once, in childhood. The rest is memory."

艺术不在于界限，而在于自由。

When we strive to become better than we are, everything around us becomes better, too.

I think the best thing you can do is to be true to yourself.

In mathematics, the art of proposing a question must be held of higher value than solving it.

酸和碱是互补的；没有另一个，一个就无法存在。