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Check this up: Arian Objections To The Trinity Refuted
In 1 Corinthians 15:24-28, the Apostle Paul speaks of the ultimate victory and the handing over of Christ's kingdom, which signifies the end of the mediatorial kingdom, not the cessation of Christ's eternal rule. The context makes it clear that Christ's rule does not end but transforms. Christ subjects Himself to the Father so that God may be all in all. This does not imply the end of Christ's rule but rather the establishment of a new order in the relationship between the Father and the Son.
The context here speaks of the end of the world after the universal resurrection, which is separated from God by sin; for the final act of Christ's redemption, everything is completed by the resurrection, so that Christ can return humanity to God, over which the power of sin, death, the flesh, the world, and the devil ceases. Paul says: to God and the Father; for humanity is then generally subjected to God, the three divine persons, but especially to the Father, as Christ's holy humanity is united with the Son of God, and thus in this humanity united with the Son, the whole redeemed human race enters into a special, filial relationship with the Father.
However, Paul wants to say, since all power is with the Son, we shouldn't believe that the Father has given up everything, or even subjected himself to the Son, as often happens with earthly fathers when they transfer power and possession to their sons. The apostle may have found it necessary to note this for the pagans converted to Christianity, who might think of the pagan myths in which Jupiter deprived his father, Saturn, of his kingdom and authority.
And after all enemies are defeated, and all humans, as well as angels, are subjected to the Son, then he himself will also be subjected to God, so that God may be the sole ruler, and everything depends directly on him. – Since Christ, with the reborn, redeemed humans, forms the new humanity, the new generation, and he, as the head, is inseparable from the body: it is natural that he will also be subjected to God, like every member of this new generation; however, this subjection can only actually refer to his human nature. This expression "that God may be all in all" denotes God's perfect dominion over the creatures.
After the resurrection comes the Last Judgment and the end of the world. According to His holy humanity, the Lord Jesus is the lord and king of the entire created world, primarily of humanity, but also the mediator of the redeemed humanity before the heavenly Father. After the Last Judgment, Christ's mediating role ceases, and eternal happiness will directly be the kingdom of God.
So, after the Last Judgment, the reign of Jesus Christ transitions into God's direct, eternal rule. The Son submits himself to the Father in terms of his human nature.
Scripture also teaches that, in a certain sense, the Father also "receives" something from the Son (e.g., Jn 16:15.23). Jesus submitted himself (hypotassó) to the Father (1 Cor 15:28), "that God may be all in all", but this in no way implies (ontological) inferiority, as he also subjected himself (hypotassó) to Mary and Joseph (Lk 2:51), and Col 3:11 claims that "Christ is all, and in all".
This passage (as Jn 17:3; 20:17; 1 Cor 11:3 and similar New Testament statements) can only be correctly understood from the perspective of the order of salvation ("status oeconomiae") and the relationship within the Trinity. God the Father has placed His Son above all creation, "putting everything under his feet" (v. 27). However, this only applies to the time until the final fulfillment. In the end, the Son hands everything over to the Father, who has subjected everything to him, and he himself forever exercises his filial position ("subordination"), which he occupied relative to the Father even before the foundation of the world. Otherwise, he would not be the Son - even if he is begotten eternally, without beginning by the Father - and thus divine in essence. (That is, Jesus differs only in being the Son - this is expressed as "begotten by the Father from eternity, without beginning" - otherwise, he possesses the same divine essence, power, "from eternity, without beginning").
Wouldn't he subject himself if he was also begotten of the Father, so in terms of origin he comes after the Father? The relationship between the Father and the Son is based on love, so this act of submission does not diminish Christ's true divinity, as if he were renouncing some of his dignity.
Hence 1 Corinthians 15:24-28 should therefore be understood in the context of the order of salvation and the relations within the Trinity. Here, the Apostle Paul discusses how Christ, during His reign, defeats all His enemies and ultimately subjects Himself to the Father so that God may be all in all. This does not mark the end of Christ's rule but the fulfillment of the order of salvation.
1 Corinthians 15:24-28 speaks of Christ handing over the kingdom to the Father after the final victory. This signifies the end of the mediatorial kingdom, not the cessation of Christ's eternal rule. The context clarifies that Christ's reign continues but in a different form. The text discusses that after the universal resurrection, the world, which had been separated from God by sin, will come to an end; for Christ's redemptive work will be completed through the resurrection, allowing Him to present humanity back to God, free from all powers of sin, death, the flesh, the world, and the devil.
Christ, together with the reborn, redeemed people, constitutes the new humanity, the new generation, and as the head, He cannot be separated from the body. After the final judgment, Christ's mediatorial role will cease, and the eternal bliss will be directly God's kingdom. Thus, after the final judgment, the reign of Jesus Christ will transition into God's direct, eternal rule. The Son will subject Himself to the Father according to His human nature.
Paul says "to God and the Father" because, thereafter, humanity will be subjected to God, to the three divine persons, but particularly to the Father, as Christ's holy humanity is united with the Son of God. In this holy humanity united with the Son, the entire redeemed human race enters into a special, filial relationship with the Father. Nevertheless, Paul wants to make it clear that since all power is with the Son, one should not believe that the Father has relinquished everything or subjected Himself to the Son, as often happens with earthly fathers when they hand over power and possessions to their sons. The apostle deemed it necessary to make this remark for the sake of the Christians converted from paganism, who might have thought of pagan mythology, where Jupiter deprived his father Saturn of his kingdom and authority.
Numerous biblical verses emphasize Christ's eternal reign, such as Luke 1:33: "And he will reign over the house of Jacob forever, and of his kingdom, there will be no end." This clearly shows that Christ's rule is eternal, not "merely until the end of the ages." In Hebrews 1:8, we also read: "But about the Son he says, 'Your throne, O God, will last forever and ever; a scepter of righteousness will be the scepter of your kingdom.'"
Christ's rule does not end at the end of the ages. 1 Corinthians 15:24-28 speaks of the conclusion of Christ's mediatorial role, and eternal bliss will directly be God's kingdom. However, Christ's eternal rule remains, and He will reign with the Father in eternity. Christ's submission to the Father pertains to His human nature and does not imply the loss of His divine dignity. This submission is a voluntary act of love, which does not diminish His divine essence and authority.