This is the subject of applied psychology, and just as in medicine, or in law, or in any of the arts, there is a vast amount of Charlatanry, but there is also genuine knowledge being patiently accumulated and standardized.
"The Book of Life: Vol. I Mind and Body; Vol. II Love and Society"
Upton Sinclair
And in exactly the same way, if it be true that we have these hidden forces in us, they will continue to manifest themselves, and masses of people will continue to flock to Lily Dale, and to pay out their hard-earned money, until such a time as our learned men set to work to find out the facts and tell us how we can utilize these forces without the aid of either superstition or Charlatanry.
"The Book of Life: Vol. I Mind and Body; Vol. II Love and Society"
Upton Sinclair
Great nobles hurried away to Paphlagonia, and fell an easy prey to the gracious charm and the ingenious Charlatanry of Alexander.
"Roman Society from Nero to Marcus Aurelius"
Samuel Dill