CCC 668 "Christ died and lived again, that he might be Lord both of the dead and of the living."[549] Christ's Ascension into heaven signifies his participation, in his humanity, in God's power and authority. Jesus Christ is Lord: he possesses all power in heaven and on earth. He is "far above all rule and authority and power and dominion", for the Father "has put all things under his feet."[550] Christ is Lord of the cosmos and of history. In him human history and indeed all creation are "set forth" and transcendently fulfilled.[551]
CCC 669 As Lord, Christ is also head of the Church, which is his Body.[552] Taken up to heaven and glorified after he had thus fully accomplished his mission, Christ dwells on earth in his Church. The redemption is the source of the authority that Christ, by virtue of the Holy Spirit, exercises over the Church. "The kingdom of Christ [is] already present in mystery", "on earth, the seed and the beginning of the kingdom".[553]
CCC 670 Since the Ascension God's plan has entered into its fulfillment. We are already at "the last hour".[554] "Already the final age of the world is with us, and the renewal of the world is irrevocably under way; it is even now anticipated in a certain real way, for the Church on earth is endowed already with a sanctity that is real but imperfect."[555] Christ's kingdom already manifests its presence through the miraculous signs that attend its proclamation by the Church.[556]
CCC 671 Though already present in his Church, Christ's reign is nevertheless yet to be fulfilled "with power and great glory" by the King's return to earth.[557] This reign is still under attack by the evil powers, even though they have been defeated definitively by Christ's Passover.[558] Until everything is subject to him, "until there be realized new heavens and a new earth in which justice dwells, the pilgrim Church, in her sacraments and institutions, which belong to this present age, carries the mark of this world which will pass, and she herself takes her place among the creatures which groan and travail yet and await the revelation of the sons of God."[559] That is why Christians pray, above all in the Eucharist, to hasten Christ's return by saying to him:[560] Marana tha! "Our Lord, come!"[561]
CCC 672 Before his Ascension Christ affirmed that the hour had not yet come for the glorious establishment of the messianic kingdom awaited by Israel[562] which, according to the prophets, was to bring all men the definitive order of justice, love and peace.[563] According to the Lord, the present time is the time of the Spirit and of witness, but also a time still marked by "distress" and the trial of evil which does not spare the Church[564] and ushers in the struggles of the last days. It is a time of waiting and watching.[565]
549 Rom 14:9.
550 Eph 1:20-22.
551 Eph 1:10; cf. 4:10; 1 Cor 15:24,27-28.
552 Cf. Eph 1:22.
553 LG [Lumen Gentium, Vatican II document] 3; 5; cf. Eph 4:11-13.
554 1 Jn 2:18; cf. 1 Pet 4:7.
555 LG 48 § 3; cf. 1 Cor 10:11.
556 Cf. Mk 16:17-18,20.
557 Lk 21:27; cf. Mt 25:31.
558 Cf. 2 Thess 2:7.
559 LG 48 § 3; cf. 2 Pet 3:13; Rom 8:19-22; 1 Cor 15:28.
560 Cf. 1 Cor 11:26; 2 Pet 3:11-12.
561 1 Cor 16:22; Rev 22:17,20.
562 Cf. Acts 1:6-7.
563 Cf. Isa 11:1-9.
564 Cf. Acts 1:8; 1 Cor 7:26; Eph 5:16; 1 Pet 4:17.
565 Cf. Mt 25:1, 13; Mk 13:33-37; 1 Jn 2:18; 4:3; 1 Tim 4:1
Why leave out 673 Since the Ascension Christ's coming in glory has been immminent,566 even though "it is not for you to know times or seasons which the Father has fixed by his own authority."567. This eschatological coming could be accomplished at any moment, even if both it and the final trial that will precede it are "delayed".568 674 The glorious Messiah's coming is suspended at every moment of history until his recognition by "all Israel", for "a hardening has come upon part of Israel" in their "unbelief" toward Jesus.569 St. Peter says to the Jews of Jerusalem after Pentecost: "Repent therefore, and turn again, that your sins may be blotted out, that times of refreshing may come from the presence of the Lord, and that he may send the Christ appointed for you, Jesus, whom heaven must receive until the time for establishing all that God spoke by the mouth of his holy prophets from of old."570 St. Paul echoes him: "For if their rejection means the reconciliation of the world, what will their acceptance mean but life from the dead?"571 The "full inclusion" of the Jews in the Messiah's salvation, in the wake of "the full number of the Gentiles",572 will enable the People of God to achieve "the measure of the stature of the fullness of Christ", in which "God may be all in all".573
At least they got the end-time conversion of the Jews correct, and the final trial that will precede it, but I find denying the literal 1,000 year reign of the Lord Jesus is to be untenable.