The only way to deep happiness is to do something you love to the best of your ability

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.

One does not, by knowing all the physical laws as we know them today, immediately obtain an understanding of anything much. I love only nature, and I hate mathematicians.

Progress in science comes when experiments contradict theory.

Everything is made of atoms.

We are not to tell nature what she’s gotta be... She's always got better imagination than we have.

Physics is not the most important thing. Love is.