From a long view of the history of mankind, seen from, say, ten thousand years from now, there can be little doubt that the most significant event of the 19th century will be judged as Maxwell's discovery of the laws of electrodynamics. The American Civil War will pale into provincial insignificance in comparison with this important scientific event of the same decade.

We never are definitely right, we can only be sure we are wrong.

If all of mathematics disappeared, physics would be set back by exactly one week.

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.

The test of all knowledge is experiment.

As you know, a theory in physics is not useful unless it is able to predict underlined effects which we would otherwise expect.

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