John D. Rockefeller — "Singleness of purpose is one of the chief essentials for success in life, no mat…"
Singleness of purpose is one of the chief essentials for success in life, no matter what may be one's aim.
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More from John D. Rockefeller
"The greatest reward that in this life can come to a man is to be able to do good for his fellow man."
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"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."
"If your only goal is to become rich, you will never achieve it."
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