There is no substitute for hard work.

I didn't fail 1000 times. The light bulb was an invention with 1000 steps.

I have a peculiar theory about radium, and I believe it is the correct one. I believe that there is some mysterious ray pervading the universe that is fluorescing to it. In other words, that all its energy is not self-constructed but that there is a mysterious something in the atmosphere that scientists have not found that is drawing out those infinitesimal atoms and distributing them forcefully and indestructibly.

Interest is the invention of Satan.

I never quit until I get what I want.

There is much more opportunity than there are people to see it.

It is the people who constitute the basis of Government credit. Why then cannot the people have benefit of their own gilt-edge credit by receiving non-interest bearing currency-instead of bankers receiving the benefit of the people's credit in interest-bearing bonds. If the United States Government will adopt this policy of increasing its national wealth without contributing to the interest collector-for the whole national debt is made up on interest charges-then you will see an era of progress and prosperity in this country such as could never have come otherwise.