Anything that won't sell, I don't want to invent. Its sale is proof of utility, and utility is success.

If I had not had so much ambition and not tried to do so many things, I probably would have been happier, but less useful.

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.

I believe that the science of chemistry alone almost proves the existence of an intelligent creator.

Everything comes to those who hustle while they wait.

Genius is 1 percent inspiration, 99 percent perspiration.

The three things that are most essential to achievement are common sense, hard work and stick-to-it-iv-ness.