眼睛是什么也看不见的，一定要用心去看。

In economics, small changes in rules can lead to large changes in outcomes.

I'm very suspicious of the word 'style'. It's a word that people use to categorize things when they don't understand them.

Lock up your libraries if you like; but there is no gate, no lock, no bolt that you can set upon the freedom of my mind.

每一个数学问题都是通向更深入理解世界的窗口。

The light passes from ridge to ridge.