Psalm 110:1&4 You have made him (The Seed of David) to have dominion over the works of Your hands; You have put all things under his feet, ... The Lord has sworn and will not repent, "You (Christ) are a priest forever after the order of Melchizedek. Hebrews discusses the priestly role of the New Covenant. Jesus stepped into this role when the Father raised him from the dead. Christ had been paying for our sins, when God stretched out His hand and returned glory to the suffering servant in the lowest part of hell (Psa 86:13; 84:11).
This resurrection using glory fulfilled the prayers of Jesus in Gethsemane "Father, the hour is come; glorify thy Son, so that thy Son also may glorify thee: As You have given him power over all flesh, so that he should give eternal life to as many as You have given him. ... And now, O Father, glorify me with Your own self with the glory which I had with You before the world was." (John 17:1,2&5).
Glory returns to the Son because that is what He laid down when He took on flesh. As the Godhead (and the Word), Jesus had power over all before He came into a body. HE was forsaken by the Father so HE could pay the sin price. Afterwards the attributes of the Father were returned to Christ as He was resurrected into righteousness and placed in the highest position of authority. As believers follow this model, they are commanded to take up their cross daily and die to self-will and, as their reasonable service, to not conform to this world.