Strange! I don't understand how it is that we can write mathematical expressions and calculate what the thing is going to do without being able to picture it.

Don't pay attention to "authorities," think for yourself.

Mathematics is not just a language. Mathematics is a language plus reasoning.

There’s so much distance between the fundamental rules and the final phenomenon, that it’s almost unbelievable that the final variety of phenomenon can come from such a steady operation of such simple rules.

It does not make any difference how beautiful your guess is. It does not make any difference how smart you are, who made the guess, or what his name is if it disagrees with experiment it is wrong. That is all there is to it.

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.

The test of all knowledge is experiment. Experiment is the sole judge of scientific truth.