The First 40 hours of work per week are for survival. Everything after that is for success.

The most necessary task of civilization is to teach people how to think. It should be the primary purpose of our public schools. The mind of a child is naturally active, it develops through exercise. Give a child plenty of exercise, for body and brain. The trouble with our way of educating is that it does not give elasticity to the mind. It casts the brain into a mold. It insists that the child must accept. It does not encourage original thought or reasoning, and it lays more stress on memory than observation.

Discontent is the first necessity of progress.

I have been at work for some time building an apparatus to see if it is possible for personalities which have left this earth to communicate with us.

Radio is just a fashion contrivance that will soon die out. It is obvious that there never will be invented a proper receiver!

Accomplishing something provides the only real satisfaction in life.

We have merely scratched the surface of the store of knowledge which will come to us. I believe that we are now, a-tremble on the verge of vast discoveries - discoveries so wondrously important they will upset the present trend of human thought and start it along completely new lines .