"If you leave home for a while ... you question the conventional wisdom you've grown up with. That doesn't mean you have to change your opinions or who you are, but it's good to ask the questions."

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Living a long life, the conventional wisdom at the time said, depended to a great extent on who we were-that is, our genes. It depended on the decisions we made-on what we chose to eat, and how much we chose to exercise, and how effectively we were treated by the medical system. No one was used to thinking about health in terms of community.

— Malcolm Gladwell