I have to disregard everybody else, and then I can do my own work.

It is important to realize that in physics today, we have no knowledge of what energy is

I learned very early the difference between knowing the name of something and knowing something.

We absolutely must leave room for doubt or there is no progress and there is no learning. There is no learning without having to pose a question. And a question requires doubt. People search for certainty. But there is no certainty. People are terrified — how can you live and not know? It is not odd at all. You only think you know, as a matter of fact. And most of your actions are based on incomplete knowledge and you really don’t know what it is all about, or what the purpose of the world is, or know a great deal of other things. It is possible to live and not know.

Science is the belief in the ignorance of experts.

To decide upon the answer is not scientific. In order to make progress, one must leave the door to the unknown ajar ajar only.

What I am going to tell you about is what we teach our physics students in the third or fourth year of graduate school... It is my task to convince you not to turn away because you don't understand it. You see my physics students don't understand it... That is because I don't understand it. Nobody does.