桀纣不以其无天下之士邪,杀其身而丧天下。故曰∶“归国宝,不若献贤而进士。”
夏桀好商纣就是没有任用天下之贤士而遭到杀身之祸吗?所以说∶“赠送国宝,不如举荐贤能的人才。” 
科学不仅是知识的学科,更是一种思维方式。
The history of the world is the history of a few men who had faith in themselves.
The boundary between physics and mathematics is not as clear-cut as we might think.
Courage doesn’t mean you don’t get afraid. Courage means you don’t let fear stop you.