It is apparent to me that the possibilities of the aeroplane, which two or three years ago were thought to hold the solution to the [flying machine] problem, have been exhausted, and that we must turn elsewhere.

I am afraid of radium and polonium ... I don't want to monkey with them.

I am a vegetarian as well as a passionate anti-alcoholic, because I can thus make better use of my brain.

Nature made us - nature did it all - not the gods of the religions.

I know of over 3,000 ways [that] a light bulb does not work.

I'd put my money on the sun and solar energy. What a source of power! I hope we don't have to wait until oil and coal run out before we tackle that.

What is a college? An institute of learning. What is a business? An institute of learning. Life, itself, is an institute of learning.