Columbia subject headings:
Christian ethics.
Mysticism.
Theology, Doctrinal.
Harvard subject headings:
Catholic Church--Doctrines.
Mysticism--Catholic Church
Mysticism--Orthodox Eastern Church
Mysticism--Protestantism.
Novoselov, M. A. (Mikhail Aleksandrovich), 1864-1938?
Orthodox Eastern Church--Doctrines.
Protestant churches--Doctrines
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Doctrines.
Theology, Doctrinal.
Princeton subject headings: