Deification in this present life is the spiritual and truly sacred rite in which the Logos of unutterable wisdom makes Himself a sacred offering and gives Himself, so far as is possible, to those who have prepared themselves.
This passage defines deification as a present-life mystical rite, a self-giving of the Logos, achieved through three progressive stages — virtue, contemplation of essences, and union with primordial light.
, The Philokalia, Volume 4, 1995thesis