Gen. 25:1-6
We may not now meditate on all this closing scene of Abraham's life, for we are occupied with Isaac. Yet it presents not a little of interest in itself, and in its bearing on eastern races who are to play their part in the glorious days of the future kingdom as they have in the past. Whatever tradition says otherwise, Keturah was not a bond-maid like Hagar, nor was she mother of the promised seed, but of six sons born to the father of the faithful.
“And Abraham took another wife, and her name [was] Keturah. And she bore him Zimran and Jokshan and Medan and Midian and Ishbak and Shuah. And Jokshan begot Sheba and Dedan; and Dedan's sons were Asshurim and Letushim and Leummim; and Midian's sons, Ephah and Epher and Enoch and Abidah and. Eldaah: all these [were] Keturah's sons. And Abraham gave all that he had to Isaac; and to the sons of the concubines that Abraham had Abraham gave gifts, and, while he yet lived, sent them away from Isaac his son, eastward to the east country” (vers. 1-6).
To none was Abraham indifferent, nor the God of Abraham who will remember them in the coming era of earth's joy and blessedness. But Isaac has a place altogether distinctive. To the rest Abraham gave gifts, and sent them away from Isaac his son, to whom he “gave all that he had.”
Thus Isaac stands before us typically as the manifest heir of all things (Heb. 1:2). This title of course belongs only in its full sense to Jesus the Son of God. As the Creator of all, it is meet that He should inherit all (Heb. 1); and through redemption and purchase (Heb. 2) He will take all in the day of displayed glory, as the exalted Son of man. He who humbled Himself as none else ever could is beyond all crowned with glory and honor: though now given, we do not yet see all things put under Him. But unseen of man He has already this supremacy in place and title according to Psa. 8:6 (7) thrice referred to in the N.T.; a supremacy so universal that He only is excepted Who subjected all things to Him. God left nothing unsubjected to Christ, as attested by His actual seat on the throne of God, the Father's throne. But this is quite distinct from the intimation of Psa. 110:2, &c. when the Lord will reign on His own throne and actively subjugate all the enemies whom Jehovah will have made His footstool. For the Lord it is who shall rule in the midst of His enemies and strike through kings in the day of His wrath. It is an evident contrast with all He is doing now at the right hand of the Majesty on high, where till that day He sits during this day of salvation by grace.
It is seasonable to recall here the specific use in the Epistles made of the citation from Psa. 8, where the glorious result of the Son of man's humiliation, announced there for Israel's instruction and joy, is set in the full light of God's final revelation. 1 Cor. 15 fixes the time and the condition. It is when not only Christ is raised from the dead, but they that are Christ's at His coming. The resurrection of the saints precedes the kingdom there described as dealing with all the enemies, even to annulling death, last enemy though it be. It is the proper work of the risen Man, Who, when all things shall have been actually subjected to Him, will Himself be subjected to Him that subjected all things to Him, giving up the kingdom to Him that is God and Father, that God [Father, Son, and Holy Spirit] may be all in all.
In Eph. 1:22 The same words are applied to Christ in His present exaltation as given to be Head over all things to the church which is His body. It is not here the risen Man, with those raised at His coming that are His, reigning to the subdual of the last foe, but the mystery about Christ and about the church, the mystery in unique greatness of Christ set over all things heavenly and earthly, and the church united to Him in that supremacy after the nearest sort, He the Head, she the body.
Heb. 2:5-9 completes the divine picture. Here the words from Psa. 8 are again employed to show that the glorification of the Lord Jesus is the pledge of their future fulfillment as a whole, when all things shall be seen put under Him. Also the habitable earth to come is not for angels to reign over. All the universe will be put under the Son of man, as surely as we see Him already crowned.
Thus we have in the last scripture the blessed fact on which Christianity depends that the once-suffering Son of man is exalted to the highest seat in heavenly glory, the assuring proof that in due time all things shall be seen, as they are not yet seen, to be put under Him. Next, the intermediate scripture lets us know that meanwhile the church is made one with Him, as the body with its Head, sharing His exaltation over all things. Hence the delay; because, as we are all aware, the body is being now formed while He is seated and waiting in the heavens. The first scripture accordingly explains that at His coming we shall be raised and like Him, in order to join the risen Lord in reigning with Him over all things, when He undertakes to reduce to subjection all the enemies which are made His footstool. For He will not reign alone. He, the Heir of all things, has joint-heirs; as it is written in Rom. 8, the Spirit Himself beareth witness with our spirit that we are children of God; and if children, heirs also, heirs of God and joint-heirs with Christ; if so be that we suffer with [Him], that we may be glorified together with [Him]. For as Heb. 10:12, 13 shows, after having offered one sacrifice for sins, He in perpetuity sat down on God's right hand, from henceforth expecting till His enemies be made a footstool of His feet. Having suffered all and done all for His friends, He will then trample down His foes, while His own reign with Him in glory.