The Placebo Effect:
- a beneficial effect, produced by a placebo drug or treatment, that cannot be attributed to the properties of the placebo itself, and must therefore be due to the patient's belief in that treatment.
In other words, when a person believes a medicine will work, the "medicine" works, even when the medicine isn't actually medicine.
Belief itself can heal.
Faith healing is sometimes attributed to the placebo effect. Imagine 10 people praying over a sick man, the man believing their prayers are healing him, the sick man healing. This happens. Faith Healing Shouldn't Work, But It Does