I’m guessing most people have heard of the Placebo Effect. A doctor tells a patient this little pill is going to help cure whatever ails her. But the pill is no medicine at all. It is a sugar pill. The unknowing patient believes she’s going to get better, so she does. It is the positive expectation that creates the cure.
Have you ever thought about what power a placebo really has? The Placebo Effect is not some imaginary thing. A real chemical change happens within a person’s body after taking a sugar pill (or receiving a saline injection, sham procedure, etc.) because the person believes in the medicinal quality.