Youcat commented through CCC - Question n. 76 - Part IV.

YOUCAT Question n. 76 - Part IV. Why did God become man in Jesus?

(Youcat answer - Repeated) “For us men and for our salvation he came down from heaven” (Nicene Creed).   

A deepening through CCC

(CCC 460) 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). 

Reflecting and meditating 

(Youcat comment) In Jesus Christ, God reconciled the world to himself and redeemed mankind from the imprisonment of sin. “God so loved the world that he gave his only-begotten Son” (Jn 3:16). In Jesus, God took on our mortal human flesh (incarnation), shared our earthly lot, our sufferings, and our death, and became one like us in all things but sin.

(CCC Comment)

(CCC 230) Even when he reveals himself, God remains a mystery beyond words: "If you understood him, it would not be God" (St. Augustine, Sermo 52, 6, 16: PL 38, 360 and Sermo 117, 3, 5: PL 38, 663).     

(This question: Why did God become man in Jesus? is continued)