"The greatest enemy of progress is 'good enough.'"

"I have always tried to do my best, and I believe that is all anyone can do."

"The man who is always looking for a handout will never be truly happy."

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

"I would not give a penny for a man's opinion on a subject if he had not risked anything on it."