一两次接触容易处理好关系，长期在一起关系就难处了。

The iron rule of nature is: You get what you reward for.If you want ants to come, you put sugar on the floor.

Words are like shadows, and shadows are like words: they say nothing, they only repeat what we want to hear.

"The important thing in science is not so much to obtain new facts as to discover new ways of thinking about them."