I am not interested in what today's mathematicians find interesting.

A scientist is never certain. ... We absolutely must leave room for doubt or there is no progress and there is no learning.

For those who want some proof that physicists are human, the proof is in the idiocy of all the different units which they use for measuring energy.

Physics is not the most important thing. Love is.

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.

Our responsibility is to do what we can, learn what we can, improve the solutions, and pass them on.

But logic is not all, one needs one's heart to follow an idea.