Jesus died for all of the sins of His own saved persons, so none will be left behind whom H died for and purchased back by His own blood!
Those left behind as reprobates or as disqualified, are still saved, because God has made the New Covenant and He will not break it; His seed shall remain forever, but not every saved believer will be found abiding in Him as His disciples and so as the church is supposed to excommunicate unrepentant believers, so will God do as the Bridegroom at the pre great trib rapture.
Those unrepentant believers and the former believers that have His seal ARE NOT excluded from entering into the millennium kingdom BECAUSE they are the ones serving the King of kings at various places from all over the new earth where there is no more sea in raising up the coming generations. They will reign as priests and kings; and that means they will be marrying in setting the examples for others in the coming generations. They have to teat from the tree of life in the city of God. The power of the second death has no hold over them, but apparently, the first death still does for why they need access to the tree of life.
The firstfruits of the resurrection are like the angels in Heaven that can never die. They have a place in the city of God as promised. Their homes are in that city of God that will come down from heaven and dwell among men after the great tribulation.
There is a glorified celestial inheritance which is the firstfruits. The vessels of gold and silver. the vessels unto honor. that lives forever like the angels and lives in the city of God.
Then there is a glorified terrestrial inheritance which is they that be Christ at His coming; is the vessels of wood and earth; that the power of the second death has no hold over them as they "represent" the city of God from various places all over the world in raising up the generations in that millennium reign of Christ.
1 Corinthians 15:21 For since by man came death, by man came also the resurrection of the dead. 22 For as in Adam all die, even
so in Christ shall all be made alive. 23 But every man in his own order: Christ the firstfruits; afterward they that are Christ's at his coming.....35 But some man will say,
How are the dead raised up? and with what body do they come? 36 Thou fool, that which thou sowest is not quickened, except it die: 37 And that which thou sowest, thou sowest not that body that shall be, but bare grain, it may chance of wheat, or of some other grain:
38 But God giveth it a body as it hath pleased him, and to every seed his own body. 39 All flesh is not the same flesh: but there is one kind of flesh of men, another flesh of beasts, another of fishes, and another of birds.
40 There are also celestial bodies, and bodies terrestrial: but the glory of the celestial is one, and the glory of the terrestrial is another. 41 There is one glory of the sun, and another glory of the moon, and another glory of the stars: for one star differeth from another star in glory.
42 So also is the resurrection of the dead. It is sown in corruption; it is raised in incorruption:
That is why the call is given to all believers, even former believers, to depart from iniquity so they too can obtain the eternal glory that comes with our salvation in Christ Jesus which is to be that vessel unto honor; that celestial inheritance.
2 Timothy 2:10
Therefore I endure all things for the elect's sakes, that they may also obtain the salvation which is in Christ Jesus with eternal glory. 11 It is a faithful saying: For if we be dead with him, we shall also live with him: 12 If we suffer, we shall also reign with him:
if we deny him, he also will deny us: 13 If we believe not, yet he abideth faithful: he cannot deny himself...…….18
Who concerning the truth have erred, saying that the resurrection is past already;
and overthrow the faith of some. 19 Nevertheless the foundation of God standeth sure, having this seal, The Lord knoweth them that are his. And, let every one that nameth the name of Christ depart from iniquity.
20 But in a great house there are not only vessels of gold and of silver, but also of wood and of earth; and some to honour, and some to dishonour. 21 If a man therefore purge himself from these, he shall be a vessel unto honour, sanctified, and meet for the master's use, and prepared unto every good work.
Do read the scriptures before responding, brother, because I am not preaching ME at all when those left behind are not excluded from the millennium, but neither do they have the same inheritance as the firstfruits of the resurrection.
Luke 20:34 And Jesus answering said unto them, The children of this world marry, and are given in marriage: 35 But they which shall be accounted worthy to obtain that world, and the resurrection from the dead, neither marry, nor are given in marriage: 36 Neither can they die any more: for they are equal unto the angels; and are the children of God, being the children of the resurrection.