Columbia subject headings:
Mysticism--Early works to 1800.
Mysticism--Germany.
Mysticism.
Spiritual life--Christianity--History of doctrines--Middle Ages, 600-1500.
Spiritual life--Early works to 1800.
Harvard subject headings:
Spiritual life--Christianity--History of doctrines--Middle Ages, 600-1500
Princeton subject headings:
Mysticism--Early works to 1800.
Spiritual life--Christianity--Early works to 1800.