错误的事实对科学进步极为有害，因为它们常常长久存在。

I constantly see people rise in life who are not the smartest, sometimes not even the most diligent, but they are learning machines. They go to bed every night a little wiser than they were when they got up.

死者是最执着的历史学家。

Knowledge is the key to unlocking the mysteries of the universe.