Simplification of modes of proof is not merely an indication of advance in our knowledge of a subject, but is also the surest guarantee of readiness for farther progress.

To measure is to know.

If we can't express what we know in the form of numbers, we really don't know much about it.

In science there is only physics; all the rest is stamp collecting.

There cannot be a greater mistake than that of looking superciliously upon practical applications of science. The life and soul of science is its practical application.

Heavier-than-air flying machines are impossible.

The more thoroughly I conduct scientific research, the more I believe that science excludes atheism.