"I think one of the EO on this thread said he meant we would share in his divine essence."
I sincerely doubt that any Orthodox here said we would share the Divine Essence. The Latins, or at least some of them, hold that position. Orthodoxy teaches that theosis is coming into union with the uncreated Divine Energies of God because God allows no union with His Divine Essence, in effect becoming "divinized" but not "deified" or in some manner obliterated by or absorbed into God (the Latins don't believe that we are absorbed into God either so far as I know). cf +Gregory Palamas
Just as a matter of curiosity, what do Protestants think happens to those who have attained theosis?
That was my mistake. I was asking about the quote by Athansius "God became man so man could become God".
Just as a matter of curiosity, what do Protestants think happens to those who have attained theosis?
I don't know. I am not a Protestant.
I know you've tried to explain theosis before but it is all greek to me. Is it similar to what we call sanctification, which occurs after we are justified and is the process whereby we turn more toward God in thought, word and deed.
I don't think protestants think about the attainment of theosis at all. By and large they have no concept of salvation beyond being let off of eternal punishment on the basis of the substitutionary atonement.
The Wesleys, who died as priests of the Church of England, though the Methodists claim them as their founders, and the first few generations of Methodists, had an understanding of salvation more akin to the Orthodox than was found among other protestants, but that is now long forgotten it seems.