Religious madness
Every enthusiast then is properly a madman. Yet his is not an ordinary but a religious madness. By religious I do not mean that it is any part of religion. Quite the reverse: religion is the spirit of a sound mind (2 Timothy 1:7), and consequently stands in direct opposition to madness of every kind. But I mean it has religion for its object; it is conversant about religion. And so the enthusiast is generally talking of religion, of God or the things of God, but talking in such a manner that every reasonable Christian may discern the disorder of his mind. Enthusiasm in general may then be described in some such manner as this: a religious madness arising from some falsely imagined influence or inspiration of God — at least, from imputing something to God which ought not to be imputed to him, or expecting something from God which ought not to be expected from him.
1771 text
12. *Every Enthusiast then is properly a madman. Yet his is not an ordinary, but a religious madness. By religious, I do not mean, that it is any part of religion. Quite the reverse: religion is, the spirit of a sound mind: and consequently stands in direct opposition to madness of every kind. But I mean, it has religion for its object; it is conversant about religion. And so the Enthusiast is generally talking of religion, of God or the things of God: but talking in such a manner that every reasonable Christian may discern the disorder of his mind. Enthusiasm in general may then be described in some such manner as this: a religious madness arising from some falsely imagined influence or inspiration of God: at least, from imputing something to God which ought not to be imputed to him, or expecting something from God which ought not to be expected from him.