Great ideas originate in the muscles.

The man who doesn’t make up his mind to cultivate the habit of thinking misses the greatest pleasure in life.

I never once failed at making a light bulb. I just found out 99 ways not to make one.

Until man duplicates a blade of grass, nature can laugh at his so-called scientific knowledge. Remedies from chemicals will never stand in favor compared with the products of nature, the living cell of the plant, the final result of the rays of the sun, the mother of all life.

The inventor can't do it all, you've got to change people. We have an enormous capacity to invent super-machinery. But our desire to install the device is weak. Human inertia is the problem, not invention. Something in man makes him resist change.

I do not believe in the God of the theologians; but that there is a Supreme Intelligence I do not doubt.

The trouble with most people is that they quit before they start.