The past is a shadow that follows us, but it is our choice whether to let it define us.

The past is never dead. It's not even past.

I’m not a guy that’s going to let my city down.

The mathematician does not study pure mathematics because it is useful; he studies it because he delights in it and he delights in it because it is beautiful.

樵夫的斧头向树要柄，树便给了它。

"The camera sees what the eye cannot."

教师的最大幸福就是把一群群孩子送往理想的彼岸。