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.

It has cost me years of thought to arrive at certain results, by many believed to be unattainable, for which there are now numerous claimants, and the number of these is rapidly increasing, like that of the colonels in the South after the war.

The practical success of an idea, irrespective of its inherent merit, is dependent on the attitude of the contemporaries. If timely it is quickly adopted; if not, it is apt to fare like a sprout lured out of the ground by warm sunshine, only to be injured and retarded in its growth by the succeeding frost.

I don't care that they stole my idea . . I care that they don't have any of their own

My ear barely caught signals coming in regular succession which could not have been produced on earth.

To stop war by the perfection of engines of destruction alone, might consume centuries and centuries. Other means must be employed to hasten the end.