John D. Rockefeller — "The greatest pleasure in life is doing what people say you cannot do."

"I was early taught to work as well as play. My life has been one long, happy holiday; Full of work and full of play— I dropped the worry on the way— And God was good to me every day."

"The way to make money is to buy when blood is running in the streets."

"I don't want a nation of thinkers, I want a nation of workers."

"The road to happiness lies in two simple principles: find what it is that interests you and that you can do well, and put your whole soul into it."

"The most important thing for a young man is to establish a credit — a reputation for being a man of your word."