"If you want to be sad, no one in the world can make you happy. But if you make up your mind to be happy, no one and nothing on earth can take that happiness from you."

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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 when you find it put your whole soul into it-every bit of energy and ambition and natural ability you have.

— John D. Rockefeller III