I owe my success to the fact that I never had a clock in my workroom. Seventy-five of us worked twenty hours every day and slept only four hours - and thrived on it.

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.

The perils of overwork are slight compared with the dangers of inactivity.

I remember that I was never able to get along at school. I was at the foot of the class.

The doctor of the future will give no medicine, but will involve the patient in the proper use of food, fresh air and exercise

I believe that the motion picture is destined to revolutionize our educational system and that in a few years it will supplant largely, if not entirely, the use of textbooks.

Two per cent. is genius, and ninety-eight per cent. is hard work.