The Word of God became man, the Son of God became the Son of Man, in order to unite man with himself and make him, by adoption, a son of God. Only by being united to one who is himself immune could we be preserved from corruption and death, and how else could this union have been achieved if he had not first become what we are? How else could what is corruptible and mortal in us have been swallowed up in his incorruptibility and immortality, to enable us to receive adoptive sonship? Therefore, the Son of God, our Lord, the Word of the Father, is also the son of man; he became the son of a man by a human birth from Mary, a member of the human race.