Origen on Theosis

Irenaeus

How, then, shall he become a God, who has not as yet been made a man? Or how can he be perfect who was but lately created? How, again, can he be immortal, who in his mortal nature did not obey his maker? For it must be that thou, at the outset, shouldest hold the rank of a man, and then afterwards partake of the glory of God.

Silvanus

He [Christ] who has exalted man became like God, not in order that he might bring God down to man, but that man might become like God.

Maximus the Confessor

Let us become the image of the one whole God, bearing nothing earthly in ourselves, so that we may consort with God and become gods, receiving from God our existence as gods.