I believe that the more thoroughly science is studied, the further does it take us from anything comparable to atheism.

We only know God in His works, but we are forced by science to admit and to believe with absolute confidence in a Directive Power-in an influence other than physical, or dynamical, or electrical forces.

I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind.

At what time does the dissipation of energy begin?

Fourier's theorem is not only one of the most beautiful results of modern analysis, but it may be said to furnish an indispensable instrument in the treatment of nearly every recondite question in modern physics.

To live among friends is the primary essential of happiness.

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