Russian religious thought is experiencing an acute crisis. The mysticism which, in pre-revolutionary days, greatly interested certain Russian intellectual circles has now reached its full development among thinkers grouped around the Russian Orthodox Theological Institute in Paris; a “new school of theology” is even being spoken of. Occasionally this group has used the term neo-gnosis, or orthodox gnosis, to describe their particular mystical tendencies. There is no question of a rupture with the Orthodox Church, but of a broadening of her doctrinal teaching, by the introduction of conceptions purported to belong to her traditions, though discarded by the official Church. So, in the name of these traditions, Fr. Bulgakov, head of the Institute, expounds a so-called sophiological doctrine based upon the conception of a hypostatized divine Wisdom, idea (in the Platonic sense) of the creation co-etemal with the Creator.

This doctrine is taught in several important works of which The Light Undimmed was written before the author's ordination. Fr. Bulgakov has subsequently developed his thought in a number of books, mostly published in Paris: The Burning Bush, The Friend of the Bridegroom, The Ladder of Jacob, Icons and their Veneration, and especially The Lamb of God, which forms the first part of a work upon theandrism intended to epitomize the writer’s sophiological teaching. We must add an essay on Hypostasis and Hypostatisation published in Prague, also a series of articles in Putj, Russian philosophical periodical isued in Paris, some of which are noteworthy as they explain the writer’s intellectual evolution.