I borrowed George Marsden's Fundamentalism and American Culture from the LOFM Little Free Library. I'm on page 6 and I can already tell I'm going to be in over my theologically-uneducated head, but oh, well. It's not as though anyone's grading me, right? I still need to take notes, though. I remember stuff better if I take notes.
(Definitions from Merriam-Webster online.)
Millenarian: 1) Of or relating to belief in a millenium; in this instance, 1a: the thousand years mentioned in Revelation 20 during which holiness is to prevail and Christ is to reign on earth
Pietist: 2) emphasis on devotional practice and experience. (Actually, I need to look into this more, because that sounds to me like pretty much every belief system, ever.) Pietism at Wikipedia; the Free Dictionary by Farlex; .
Quiescent: 1) Marked by inactivity or repose; tranquilly at rest. 2) Causing no trouble or symptoms [quiescent gallstones]. Obviously, in this context, the former usage applies.