Clement of Alexandria on Theosis

We are called upon by the still small voice, a whispering from our father, to work out our own salvation. Briefly the constructive parts of the plan of salvation are these: What man is, God once was; what God is now, man may become; the glory of God is intelligence. Nothing can be annihilated and no act lost. It is impossible to be saved in ignorance.

As concerning the resurrection, I will merely say that all men will come from the grave as they lie down, whether old or young; there will not be “added unto their stature one cubit,” neither taken from it; all will be raised by the power of God, having spirit in their bodies, and not blood.

“As man now is, God once was: as God now is, man may be.” These children are now at play, making mud worlds. The time will come when some of these boys, through their faithfulness to the gospel, will progress and develop in knowledge, intelligence and power, in future eternities, until they shall be able to go out into space where there is unorganized matter and call together the necessary elements, and through their knowledge of and control over…

Yea, I say, the Word of God became a man so that you might learn from a man how to become a god.

It leads us to the endless and perfect end, teaching us beforehand the future life that we shall lead, according to God, and with gods; after we are freed from all punishment and penalty which we undergo, in consequence of our sins, for salutary discipline.