The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.
知识的最大敌人不是无知，而是知识的幻觉。
"To live is the rarest thing in the world. Most people exist, that is all."
At the close of our studies， we knew all the past of physics， but nothing of the present and the future.
Freedom is never voluntarily given by the oppressor； it must be demanded by the oppressed.
In physics, the simplest explanation is often the correct one.
我对菲律宾——我从那里过来——的人民说过，我会回来的。今夜，我再说一遍那句话：我会回来的！