You've heard the expression, “I'll believe it when I see it.” In fact, the opposite is true: You'll see it when you believe it. Objective reality, as Werner Heisenberg demonstrated in the 1920s, doesn't exist. According to the Heisenberg Uncertainty Principle, the observer influences the circumstances being observed, a discovery that's being expanded upon by today's quantum physicists. By focusing your mind on something, you actually affect it and even bring it into being. That's the basis of all magic.