What one man calls God, another calls the laws of physics.

A century from now it will no more occur to a normal person to mate with a person eugenically unfit than to marry a habitual criminal.

So we find that the three possible solutions of the great problem of increasing human energy are answered by the three words: food, peace, work.

Sometimes I feel that by not marrying, I made too great a sacrifice to my work.

The present is theirs; the future, for which I really worked, is mine.

The future will show whether my foresight is as accurate now as it has proved heretofore.

I hold that space cannot be curved, for the simple reason that it can have no properties. It might as well be said that God has properties. He has not, but only attributes and these are of our own making. Of properties we can only speak when dealing with matter filling the space. To say that in the presence of large bodies space becomes curved is equivalent to stating that something can act upon nothing. I, for one, refuse to subscribe to such a view.