As Lord, Christ is also head of the Church, which is his Body. 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".
Christ the Lord already reigns through the Church, but all the things of this world are not yet subjected to him. the triumph of Christ's kingdom will not come about without one last assault by the powers of evil.
Since the Ascension God's plan has entered into its fulfilment. We are already at "the last hour"."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."Christ's kingdom already manifests its presence through the miraculous signs that attend its proclamation by the Church.
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. This reign is still under attack by the evil powers, even though they have been defeated definitively by Christ's Passover. 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." That is why Christians pray, above all in the Eucharist, to hasten Christ's return by saying to him: Maranatha! "Our Lord, come!"
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 and ushers in the struggles of the last days. It is a time of waiting and watching
Before Christ's second coming the Church must pass through a final trial that will shake the faith of many believers. The persecution that accompanies her pilgrimage on earth will unveil the "mystery of iniquity" in the form of a religious deception offering men an apparent solution to their problems at the price of apostasy from the truth. the supreme religious deception is that of the Antichrist, a pseudo-messianism by which man glorifies himself in place of God and of his Messiah come in the flesh.
The Antichrist's deception already begins to take shape in the world every time the claim is made to realize within history that messianic hope which can only be realized beyond history through the eschatological judgement. the Church has rejected even modified forms of this falsification of the kingdom to come under the name of millenarianism,especially the "intrinsically perverse" political form of a secular messianism.
The Church will enter the glory of the kingdom only through this final Passover, when she will follow her Lord in his death and Resurrection. The kingdom will be fulfilled, then, not by a historic triumph of the Church through a progressive ascendancy, but only by God's victory over the final unleashing of evil, which will cause his Bride to come down from heaven. God's triumph over the revolt of evil will take the form of the Last Judgement after the final cosmic upheaval of this passing world.
On Judgement Day at the end of the world, Christ will come in glory to achieve the definitive triumph of good over evil which, like the wheat and the tares, have grown up together in the course of history.
When he comes at the end of time to judge the living and the dead, the glorious Christ will reveal the secret disposition of hearts and will render to each man according to his works, and according to his acceptance or refusal of grace.