ENTHUSIASM. The history of enthusiasm is as much the history of the word as of the phenomenon it signifies. In the English-speaking world, the word came to prominence as a technical religious term in the seventeenth century, used always in reference to religious experience, and, for the most part, as a term of denigration. For about two hundred years, the usual usage was to denote ill-regulated religious emotion or, more specifically, fancied inspiration, the false or deluded claim to have received divine communications or private revelations. In the course of the last hundred years the technical religious meaning has been almost completely superseded by the more positive meaning now current (ardent zeal for a person, principle, or cause), though unfavorable overtones still cling to the derivative term, enthusiast, as connoting an impractical visionary or self-deluded person. It is, however, the technical religious term with which we are here...