Fools call wise men fools. A wise man never calls any man a fool.

The greatest discoveries will be along spiritual lines. This is the field where miracles are going to happen. Spiritual power is the greatest underdeveloped power and has the greatest future.

I never did anything by accident, nor did any of my inventions come by accident; they came by work.

To have a great idea, have a lot of them.

Work while others are wishing.

That is to say, under the old way any time we wish to add to the national wealth we are compelled to add to the national debt. Now, that is what Henry Ford wants to prevent. He thinks it is stupid, and so do I, that for the loan of $30,000,000 of their own money the people of the United States should be compelled to pay $66,000,000 - that is what it amounts to, with interest.

I would construct and work along various lines until I found them untenable. When one theory was discarded, I developed another at once. I realized very early that this was the only possible way for me to work out all the problems.