Dianetics is a spiritual healing technology that can help alleviate unwanted sensations and emotions, irrational fears and psychosomatic illnesses (illness caused or aggravated by mental stress).
Dianetics is derived from the Greek words dia, meaning through, and nous, mind or soul. The full definition of Dianetics is what the mind (or soul) is doing to the body.
L. Ron Hubbard’s  Dianetics: The Modern Science of Mental Health was published May 9, 1950. It has appeared on 600 bestseller lists and is now translated in 50 languages with 22 million copies sold.
Before Dianetics, prevailing scientific thought held that Man's mind was his brain, nothing more than a collection of cells and neurons. IQ and personality were considered fixed and unchanging. With Dianetics, IQ and personality could be improved. Its effectiveness has been documented in a multitude of case histories over more than half a century of application.