The test of a first-rate intelligence is the ability to hold two opposed ideas in mind at the same time and still retain the ability to function.

成功的秘诀就是不断前进。

变化的大引擎——技术。

I believe that love is a better teacher than the sense of duty， he said， at least for me.

Mathematics allows us to see the hidden structures that govern the world around us.

数学中的每个问题都是一个等待解决的谜题，而乐趣就在于解决的过程。