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

Many of life's failures are people who did not realize how close they were to success when they gave up.

We often miss opportunity because it's dressed in overalls and looks like work.

The best thinking has been done in solitude. The worst has been done in turmoil.

I have friends in overalls whose friendship I would not swap for the favor of the kings of the world.

Our greatest weakness lies in giving up. The most certain way to succeed is always to try just one more time.