2.
He who receives Communion is made holy and Divinized in soul and body in the same way that water, set over a fire, becomes boiling... Communion works like yeast that has been mixed into dough so that it leavens the whole mass; ...Just as by melting two candles together you get one piece of wax, so, I think, one who receives the Flesh and Blood of Jesus is fused together with Him by this Communion, and the soul finds that he is in Christ and Christ is in him
Cyril of Alexandria