The past is not a shadow but a living presence.

A quarry should heal the earth even as it harvests from it.

【释义】：早晨能发现昨夜的错误，今日能悔改昨日的过失。  

I don't need validation from anyone else.

“物质”不是唯一的事实标准：还存在心理事实，而且无法以任何的物质方式来解释、证明、或辩驳它。

失败并不可怕，可怕的是不敢尝试。

Every discovery in physics opens a door to a new mystery, and that is the beauty of science.

The real challenge in computer science is not to write programs, but to understand the nature of computation.

没有伟大的意志力就没有伟大的才能。