Napoleon's Hill "Outwitting the Devil" mentions this. The "Devil" admits to dwelling in the unused portion of human brains. The book is very interesting. Hill is quite adamant it was meant to be taken literally.
Napoleon's Hill "Outwitting the Devil" mentions this. The "Devil" admits to dwelling in the unused portion of human brains. The book is very interesting. Hill is quite adamant it was meant to be taken literally.