"The thing that always strikes me is how much power one person has. Everybody has so much power to help and to change if they just exercise it and get after it."

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You have to believe in a placebo or it wont work, but if it works, its obviously working in some indirect way, through feedback in the immune system, let us say, or in the willpower of the patient to take a more strenuous exercise in their own therapy.

— Charles Jencks