Thus the Christ-event in and of itself is not the final climax or a closure event. The expression "first fruits" signifies that time strains toward its actualization in the harvest of the final resurrection of the dead. The connection between the resurrection of Christ and God's final triumph is confirmed by Paul's view of the Spirit. As Christ is related to the general resurrection, so also is the Holy Spirit related to the coming glory of God. In fact, the Spirit, according to Paul, is the agent of the future glory of God in the present; it is the down payment (Rom. 8:23) or the guarantee (2 Cor. 1:22) of the end time and thus the signal of its coming and of God's imminent triumph. . ." pg.32 J. Christiaan Beker "The Triumph Of God: The Essence of Paul's Thought"
" For ye have not received the spirit of bondage again to fear; but ye have received the Spirit of adoption, whereby we cry, Abba, Father.
 The Spirit itself beareth witness with our spirit, that we are the children of God:
 And if children, then heirs; heirs of God, and joint-heirs with Christ; if so be that we suffer with him, that we may be also glorified together.
 For I reckon that the sufferings of this present time are not worthy to be compared with the glory which shall be revealed in us.
 For the earnest expectation of the creature waiteth for the manifestation of the sons of God.
 For the creature was made subject to vanity, not willingly, but by reason of him who hath subjected the same in hope,
 Because the creature itself also shall be delivered from the bondage of corruption into the glorious liberty of the children of God.
 For we know that the whole creation groaneth and travaileth in pain together until now.
 And not only they, but ourselves also, which have the firstfruits of the Spirit, even we ourselves groan within ourselves, waiting for the adoption, to wit, the redemption of our body."Romans 8:15-23