Psalms 89:27

Also I will make him my firstborn. Among the kings the seed of David were to be most favoured and indulged with most love and paternal regard from God: but in Jesus we see this in the highest degree verified, for he has preeminence in all things, inasmuch as by inheritance he has a more glorious name than any other, and is higher than the kings of the earth. Who can rival heaven's Firstborn? The double portion and the government belong to him. Kings are honoured when they honour him, and those who honour him are kings! In the millennial glory it shall be seen what the covenant stores up for the once despised Son of David, but even now faith sees him exalted as King of kings and Lord of lords. Lo, we bow before thee, thou Heir of all things! Our sheaves do obeisance to thy sheaf. All thy mother's children call thee blessed. Thou art he whom thy brethren shall praise. Jesus is no servant of princes, nor would he have his bride, the church, degrade herself by bowing before kings and eating the bread of a pensioner at their hands. He and his kingdom are higher than the kings of the earth. Let the great ones of the earth be wise and submit to him, for he is Lord, and he is the governor among the nations.

I will make him my first-born - I will deal with him as a father by his first-born son, to whom a double portion of possessions and honors belong. First-born. is not always to be understood literally in Scripture. It often signifies simply a well-beloved, or best-beloved son; one preferred to all the rest, and distinguished by some eminent prerogative. Thus God calls Israel his son, his first-born, Exo 4:22. See also Sirach 36:12. And even Ephraim is called God’s first-born, Jer 31:9. In the same sense it is sometimes applied even to Jesus Christ himself, to signify his supereminent dignity; not the eternal Sonship of his Divine nature, as inveterate prejudice and superficial thinking have supposed.

Also I will make him my first-born - He shall be regarded and treated by me as the first-born son is in a family; that is, with distinguished favor and honor. Compare Gen 27:19; Gen 29:26; Exo 4:22; Exo 13:12; Jer 31:9. See also the notes at Col 1:15, notes at Col 1:18. Higher than the kings of the earth - Than other kings; the most exalted among kings and rulers. This was entirely fulfilled in David, who occupied a pre-eminence among princes and rulers which no other king did: a prominence alike in his own personal character and his reign; in his relation to God; and in the fact that he was the ancestor of the Messiah, the “King of kings, and Lord of lords” Rev 19:16; “the prince of the kings of the earth,” Rev 1:5.