The Son of God shares in our human nature so that we can share in his divine nature. The Catechism of the Catholic Church, drawing from Scripture and the Catholic Tradition, emphasizes this connection between God becoming man and our being made like God:Well said. As Eric has said, we must not read the wrong idea into this notion of deification. It is not a confusion of humanity and divinity, such as one might find in the Eastern non-Christian religions. It is also not as Mormons might suggest: We do not become beings with our own divine nature or ability. What we become is solely dependent upon the one true God, for the divine life in which we partake is His. I am reminded of one of the sermons of one of my favorite Dominican mystics, Johannes Tauler, who preached:
The Word became flesh to make us “partakers of the divine nature” (2 Pt 1:4): “For this is why the Word became man, and the Son of God became the Son of man: so that man, by entering into communion with the Word and thus receiving divine sonship, might become a son of God.” (St. Irenaeus, Adv. haeres. 3, 19, 1: PG 7/1, 939) “For the Son of God became man so that we might become God.” (St. Athanasius, De inc. 54, 3: PG 25, 192B) “The only-begotten Son of God, wanting to make us sharers in his divinity, assumed our nature, so that he, made man, might make men gods.” (St. Thomas Aquinas, Opusc. 57, 1-4) (CCC 460)Too often we look at Heaven as just a really great earth: we eat whatever we want, we hang out with whoever we want and we never get sick or hurt. But Heaven is less about what we do and more about what we become. When we enter into Heaven we are transformed into a new creation: while keeping our human nature we participate in the divine nature.
What God has in himself by nature, that he now imparts to the soul by grace, the divine being, unnamed and without form or manner of existence that we can express. And now everything that is done in that soul God himself does, acting, knowing, loving, praising, enjoying, all of which the soul has and does as if it were a passive instrument of God's activity. One can no more speak of this state clearly than he can speak clearly of the divine life itself. To men and angels it is far too high for expression.I wish you all a blessed 4th week of Advent as we prepare for that most awesome celebration.