Large portions of life's disappointments are individuals who did not understand that they were so near achievement when they surrendered.

Ideas without execution are hallucinations.

As a cure for worrying, work is far better than whiskey. I always found that, if I began to worry, the best thing I could do was focus upon doing something useful and then work very hard at it. Soon, I would forget what was troubling me.

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

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.

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

I can never pick up a thing without wishing to improve it.