我是一个战士，我非常坚定。

Every great and deep difficulty bears in itself its own solution. It forces us to change our thinking in order to find it.

If one has realised, he is that which alone is, and which alone has always been. He cannot describe that state. He can only be that.

A mathematician is a device for turning coffee into theorems.

不要害怕放弃好的，去追求伟大的。