One of the great paradoxes of the Christian faith is its eschatology. We experience the eschaton, for the eschaton has come among us, the eschaton has been immanentized and yet the world has not ended. Indeed, it should be clear to anyone looking out into the world that it has not ended, but it continues on, seemingly unaffected by Christ. To explain this paradox, it is typical for theologians to talk about how the eschaton is “already and not yet,” that is, that the kingdom of God is both present among us today and yet the world has not yet completely entered into the kingdom of God. The preaching of Christ, as we see in the Gospels, proclaimed the entrance of the eschaton into the world: “Now after John was arrested, Jesus came into Galilee, preaching the gospel of God, and saying, ‘The time is fulfilled, and the kingdom of God is at hand; repent, and believe in the gospel’” (Mark 1:14-15). And yet, when we look around us, to the world beside us, do we see the kingdom of God? No, we see a world engulfed by sin, a world where the devil seems to maintain control. How then are we as Christians to believe that the kingdom of God is here, amongst us, when we see the world in such dire straights? It is because we are the presence of the kingdom in the world, and we are called to take the grace of Christ into the world and to work for its transformation, even as we have been transformed by Christ.
The Church is the body of Christ. Through our baptism we are united with him and his work, and we find the Spirit of Christ, the Holy Spirit, now dwells in us even as it did Christ, to help us continue the work of Christ in the world. “For just as the body is one and has many members, and all the members of the body, though many, are one body, so it is with Christ. For by one Spirit we were all baptized into one body — Jews or Greeks, slaves or free — and all were made to drink of one Spirit” (1Cor 12:12-13). The Church is where the kingdom of God is found in the world, and it is through the Church, which is the Body of Christ, that the world can be united with Christ and find its place in the eschaton. The Church is a sacrament – in her, the grace of God is found immanentized. Indeed, because it is in the Church there is salvation, her very nature is eschatological, as Alexander Schmemann properly points out: “She is a sacrament in the eschatological dimension because the original world of God’s creation, revealed by the Church, has already been saved by Christ.” Schmemann explains this comes from the fact that all sacraments have eschatological dimensions to them: “A SACRAMENT IS BOTH COSMIC AND ESCHATOLOGICAL. It refers at the same time to God’s world as he first created it and to its fulfillment in the kingdom of God.”
Sacraments, by their eschatological nature, reflect the immanence of the eschaton, that it is now among us, that we have become one with it when we partake of them. When we are baptized into the body of Christ, we become one with Christ. When we partake of the eucharist, we continue our reception into Christ, for we become partakers of immortality through communion. “When, therefore, the mingled cup and the manufactured bread receives the Word of God, and the Eucharist of the blood and the body of Christ is made, from which things the substance of our flesh is increased and supported, how can they affirm that the flesh is incapable of receiving the gift of God, which is life eternal, which [flesh] is nourished from the body and blood of the Lord, and is a member of Him?— even as the blessed Paul declares in his Epistle to the Ephesians, that we are members of His body, of His flesh, and of His bones.”
A denial of the immanentized eschaton is a denial of the sacraments. This should not surprise us at all. This is exactly the denial we find in history by the Gnostics, especially as is found in their rejection of the eucharist. They denied communion because they did not believe that the eschaton can be, or has been, immanentized in the flesh; they denied the incarnation because they wanted to keep the spiritual and physical realms distinct. “They abstain from the Eucharist and prayer, because they do not confess that the Eucharist is the flesh of our Saviour Jesus Christ who suffered for our sins, which the Father raised up by his goodness.”
Yet, the incarnation, as the eschaton immanentized, was done for our sake, so that we can partake of the divine mysteries and become one with the eschaton. “For He was made man that we might be made God ; and He manifested Himself by a body that we might receive the idea of the unseen Father; and He endured the insolence of men that we might inherit immortality.” The Word of God gives us his flesh and blood as the medicine of immortality. By partaking of them, we find ourselves united with Christ; the Church is constituted as the Body of Christ through the Eucharist. “Historians of theology have many times noted that in the early patristic tradition we find no definition of the Church. The reason for this, however, lies not in the ‘lack of development’ of the theology of that time – as several learned theologians suppose – but in the fact that in her early tradition the Church was not an object of ‘definition’ but the living experience of the new life. This experience – in which we find also the institutional structure of the Church, her hierarchy, canons, liturgy, etc. — was sacramental, symbolical by its very nature, for the Church exists in order to be always changing into that same reality that she manifests, the fulfilment of the invisible in the visible, the heavenly in the earthly, the spiritual in the material.”
The Church finds its mission to be the mission of Christ to the world, to show the world the love of Christ in order to transform it. We are the ones who make the not yet become a part of the “already” as we do the work of Christ by being his continued presence in the world and bring more and more of the world into Christ. A denial of this ends up being a denial of the eucharist, a denial that we partake of the body and blood of Christ and become one with Christ. “But vain in every respect are they who despise the entire dispensation of God, and disallow the salvation of the flesh, and treat with contempt its regeneration, maintaining that it is not capable of incorruption. But if this indeed do not attain salvation, then neither did the Lord redeem us with His blood, nor is the cup of the Eucharist the communion of His blood, nor the bread which we break the communion of His body.”
The world is divided in many different ontological categories (such as creature/creator; visible/invisible; animate/inanimate; rational/irrational; male/female, et. al); through the fall, those categories are not mere distinctions, but points of rivalry and contention; in and through the work of Christ, and thus, in and through humanity as it is united in Christ, these hostilities are to be overcome. That we are partakers of immortality through the eucharist means we are to be as the immortal one, we become deified through the Spirit, and, having become one with Christ, we are sent back into the world to unite it with us so as to make it our gift of thanks to the Father. “For humanity clearly has the power of naturally uniting at the mean point of each division since it is related to the extremities of each division in its own parts. Through that capacity it can come to be the way of fulfillment of what is divided and be openly instituted in itself as the great mystery of the divine purpose. It proceeds harmoniously to each of the extremities in the things that are, from what is close at hand to what is remove, from what is worse to what is better, lifting it up to God ands fully accomplishing union. For this reason the human person was introduced last among being, as a kind of natural bond mediating between the universal poles through their proper parts, and leading into unity in itself those things that are naturally set apart from on another by a great interval.”
God’s love is the vehicle for the incarnation, for the lover gives themselves over to the beloved, and a perfect lover (God) gives themselves completely over to their beloved (as was shown with Jesus on the cross). And it is through such love, when we receive it in ourselves, we find ourselves joining in the work of Christ and becoming lovers of the world, giving ourselves over to the world for its transformation. This is the work the Church is called to do in history. We are each given our own unique call, our unique mission in the world, which is what Paul is telling us in Romans: “For as in one body we have many members, and all the members do not have the same function, so we, though many, are one body in Christ, and individually members one of another” (Rom12:4-5). Vatican II reminds us that this call is real, and we must not excuse ourselves from following this call to work for the salvation of the earth just because we are waiting for heaven. “It is a mistake to think that, because we have no lasting city, but seek the city which is to come, we are entitled to evade our earthly responsibilities; this is to forget that because of our faith we are all the more bound to fulfill these responsibilities according to each one’s vocation.” Thus, as the continued presence of the eschaton in the world, we are reminded: “That the earthly and heavenly city penetrate one another is a fact open only to the eyes of faith; moreover, it will remain a mystery of human history, which will be harassed by sin until the perfect revelation of the splendor of the children of God. In pursuing its own salvific purpose not only does the church communicate divine life to humanity but in a certain sense it casts the reflected light of the divine life over all the earth, notably in a way it heals and elevates the dignity of the human person, in the way it consolidates society, and endows people’s daily activity with a deeper sense of meaning.”
The Church as the Body of Christ is itself the realization of the immantentized eschaton; it seeks to bring the world into itself, to transfigure it in the uncreated light of Tabor. This is possible only because the Church truly guided by the Spirit of Christ, and, through that Spirit, truly takes the things of this world and transforms it into Christ, incorporating it into the Body of Christ. “In other word, where the Holy Spirit is, there is the kingdom of God. Through his coming on the ‘and great day of Pentecost’ the Holy Spirit transforms this last day into the first day of the new creation and manifests the Church as the gift and presence of this first and ‘eighth’ day.” We now do the work of Christ in the world, and continue the work of the eschaton immanentized in the world. This means, of course, we are called to be the workers of healing and of peace, even if the world itself will put on us the cross as a response. “Christ’s example in dying for us sinners teaches us that we must carry the cross, which the flesh and the world inflict on the shoulders of any who seek after peace and justice.” We are to die to the self, to crucify ourselves, so that we can indeed be transformed by the kingdom of God and find ourselves one with it. For the kingdom of God is amongst us.
But for those who deny the immanentized eschaton, what is left for them? There is no Christ, there is no incarnation, there is no eucharist, there is no church; there is only the realm of chaos unaffected by Christ. That is, there is only hell.
 Of course, the world and its history has been incomprehensibly affected by Christ; this is why it must be said it only seemingly appears unchanged. Thus, as GS teaches, “The Lord is the goal of human history, the focal point of the desires of history and civilization, the center of humanity, the joy of all hearts, and the fulfillment of all aspirations,” Gaudium et Spes 45 in Vatican Council II: Constitutions, Decrees, Declarations. Ed. Austin Flannery, OP (Northport, New York: Costello Publishing Company, 1996), 216.
 Alexander Schmemann, The Eucharist. trans. Paul Kachur (Crestwood, NY: St Vladimir’s Seminary Press, 1987), 35.
 Ibid., 34.
 St Irenaeus, Against Heresies V.3 in ANF(1):528.
  St. Ignatius of Antioch, To the Smyrnaeans VII in The Apostolic Fathers I, trans. Kirsopp Lake (Cambridge: Harvard University Press, 1985), 259. This was one of many texts St Ignatius wrote against the Gnostics. See also St Ignatius to the Smyrnaeans II, V; to the Trallians X; to Ephesians VII, et. al.
 St Athanasius, On the Incarnation 54.3 in NPNF2 (4):65.
 Alexander Schmemann, The Eucharist, 35.
 St Irenaeus, Against Heresies V.2 in ANF(1):528.
  St Maximus the Confessor, Difficulty 41 in Maximus the Confessor. Trans. Andrew Louth (London: Routledge, 1996), 157.
 St Maximus the Confessor, Letter 2 in Maximus the Confessor. Trans. Andrew Louth (London: Routledge, 1996), 91.
 Gaudium et Spes 43 in Vatican Council II: Constitutions, Decrees, Declarations, 211.
 Gaudium et Spes 40 in Vatican Council II: Constitutions, Decrees, Declarations, 207.
 Alexander Schmemann, The Eucharist, 36.
 Gaudium et Spes 38 in Vatican Council II: Constitutions, Decrees, Declarations, 203.