Tertio Millennio Adveniente
From "Tertio Millennio Adveniente"
Apostolic Letter of Pope John Paul II for the Third Millennium, 1994
Jesus Christ is the new beginning of everything. In him all things come into their own, they are taken up and given back to the Creator from whom they first came.
Jesus Christ is the recapitulation of everything (cf. Eph 1:10) and at the same time the fulfilment of all things in God: the fulfilment which is the glory of God....All creation is in reality a manifestation of his glory, in particular, man is the epiphany of God’s glory, man who is called to live by the fullness of life in God.
(from Para. 6)
God created the world through his Word, the principle and archetype of everything
John [in the prologue of his Gospel] speaks of the Word who in the beginning was with God, and through whom everything which exists was made. (cf. Jn 1:1-4) The only-begotten Son is the "first-born of all creation" (Col 1:15). The Word is Eternal Wisdom, the thought and substantial image of God: "He reflects the glory of God and bears the very stamp of his nature" (Heb 1:3). Eternally begotten and loved by the Father, he is the principle and archetype of everything that was made.
(from Para. 3)
Christ reveals God’s plan for all creation, and for man in particular
Christ, the Redeemer of the world is the one Mediator between God and man, and there is no other name under heaven by which we can be saved. "For he has made known to us in all wisdom and insight...his purpose which he set forth in Christ as a plan for the fullness of time, to unite all things in him, things in heaven and things on earth" (Eph 1:7-10).
(from Para. 4)
Christ, the Son who is of one being with the Father, is therefore the one who reveals God’s plan for all creation and for man in particular. "He fully reveals man to man himself and makes his supreme calling clear...by his Incarnation the Son of God united himself in some sense with every man" . (Vat II, GS 22)
From para 6:
Christ the definitive word about mankind and its history
Jesus Christ does not in fact merely speak ‘in the name of God’ like the Prophets but he is God himself speaking in his Eternal Word made flesh...No one has ever seen God; the only Son who is in the bosom of the Father, he has made him known" (Jn 1:18).
From para.5:
Christ, true God and true man, the Lord of the cosmos, is also the Lord of history, of which he is "the alpha and the omega", "the beginning and the end" (Rev 1:8; 21:16). In him the Father has spoken the definitive word about mankind and its history.