Everything is made of atoms.

Science alone of all the subjects contains within itself the lesson of the danger of belief in the infallibility of the greatest teachers of the preceding generation.

What Do You Care What Other People Think?

We can deduce, often, from one part of physics like the law of gravitation, a principle which turns out to be much more valid than the derivation.

What we need is imagination, but imagination in a terrible strait-jacket.

The same equations have the same solutions

Any schemes - such as 'think of symmetry laws', or 'put the information in mathematical form', or 'guess equations'- are known to everybody now, and they are all tried all the time. When you are stuck, the answer cannot be one of these, because you will have tried these right away...The next scheme, the new discovery, is going to be made in a completely different way.