CCC 460 The Word became flesh to make us "partakers of the divine nature":78 "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."79 "For the Son of God became man so that we might become God."80 "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."81
Absolute willful ignorance. We can see that by the repeated ignoring of the footnotes in the Article of the Catechism:
footnote 78: from 2 Peter 1:4-
"by which he has granted us his precious and very great promises, that through these you may escape from the corruption that is in the world because of passion, and become partakers in the divine nature."
footnote 79:
"Adversus haereses 3, 19, 1
But again, those who assert that He was simply a mere man, begotten by Joseph, remaining in the bondage of the old disobedience, are in a state of death having been not as yet joined to the Word of God the Father, nor receiving liberty through the Son, as He does Himself declare: "If the Son shall make you free, ye shall be free indeed." But, being ignorant of Him who from the Virgin is Emmanuel, they are deprived of His gift, which is eternal life; and not receiving the incorruptible Word, they remain in mortal flesh, and are debtors to death, not obtaining the antidote of life. To whom the Word says, mentioning His own gift of grace: "I said, Ye are all the sons of the Highest, and gods; but ye shall die like men." He speaks undoubtedly these words to those who have not received the gift of adoption, but who despise the incarnation of the pure generation of the Word of God, defraud human nature of promotion into God, and prove themselves ungrateful to the Word of God, who became flesh for them. For it was for this end that the Word of God was made man, and He who was the Son of God became the Son of man, that man, having been taken into the Word, and receiving the adoption, might become the son of God. For by no other means could we have attained to incorruptibility and immortality, unless we had been united to incorruptibility and immortality. But how could we be joined to incorruptibility and immortality, unless, first, incorruptibility and immortality had become that which we also are, so that the corruptible might be swallowed up by incorruptibility, and the mortal by immortality, that might receive the adoption of sons?"
footnote 80:
St. Athanasius, De incarnatione 54, 3
As, then, he who desires to see God Who by nature is invisible and not to be beheld, may yet perceive and know Him through His works, so too let him who does not see Christ with his understanding at least consider Him in His bodily works and test whether they be of man or God. If they be of man, then let him scoff; but if they be of God, let him not mock at things which are no fit subject for scorn, but rather let him recognise the fact and marvel that things divine have been revealed to us by such humble means, that through death deathlessness has been made known to us, and through the Incarnation of the Word the Mind whence all things proceed has been declared, and its Agent and Ordainer, the Word of God Himself. He, indeed, assumed humanity that we might become God. He manifested Himself by means of a body in order that we might perceive the Mind of the unseen Father. He endured shame from men that we might inherit immortality. He Himself was unhurt by this, for He is impassible and incorruptible; but by His own impassibility He kept and healed the suffering men on whose account He thus endured. In short, such and so many are the Saviour's achievements that follow from His Incarnation, that to try to number them is like gazing at the open sea and trying to count the waves. One cannot see all the waves with one's eyes, for when one tries to do so those that are following on baffle one's senses. Even so, when one wants to take in all the achievements of Christ in the body, one cannot do so, even by reckoning them up, for the things that transcend one's thought are always more than those one thinks that one has grasped."
"As we cannot speak adequately about even a part of His work, therefore, it will be better for us not to speak about it as a whole. So we will mention but one thing more, and then leave the whole for you to marvel at. For, indeed, everything about it is marvellous, and wherever a man turns his gaze he sees the Godhead of the Word and is smitten with awe."
footnote 81:
http://www.vatican.va/roman_curia/pont_committees/eucharist-congr/documents/rc_committ_euchar_doc_20041010_turkson-catechisis-youth_en.html