Hebrews 8:1

Heb. 8:1. Now of the things which we have spoken (this is) the sum: We have such a high priest, who is set on the right hand of the throne of the Majesty in the heavens;

Notes on the Bible provides commentary on Hebrews 8:1:

[310] Hebrews 8:1, "We have such an high priest who is set on the right hand of the throne of the Majesty in the heavens." This is often taken notice of in this epistle, as Hebrews 1:3; Hebrews 10:12; Hebrews 12:2. This high priest, when he enters into the holy of holies with his own blood, does not only appear there standing before the throne, or mercy-seat, as the high priests of old were wont to do when they entered into the holy of holies once a year with the blood of others, but sits down on the throne in the holy of holies, on the right hand of God; which shows the exceeding dignity of the priest, his nearness and dearness to God, and the absolute sufficiency of the sacrifice that he had offered, the blood of which he entered in there with, and the dignity and honourableness of the manner of interceding there; which was not merely by supplication, as one in humble posture before the throne, but by representing his will to the Father, as one sitting in glory with him on the throne, as John 17:24. "Father, I will that they that thou hast given me be with me," etc. His thus being admitted and invited of God to sit with him on the throne, denotes God's full, and perfect, and great satisfaction, and well-pleasedness in, and rest on, this high priest when he had offered his sacrifice, and entered into the holy of holies with the blood of it to obtain of God that for which he shed his blood. God immediately receives him, and accepts him and his plea, and says to him, "Sit thou on my right hand till I make thine enemies thy footstool." And it is a note of Christ's perfect assurance of the Father's acceptance of him as priest, and his rest in him, as having virtually obtained what he intercedes for, having all things put into his hands, being made head over all things to the church, that he does not merely stand before the throne supplication, hoping, and waiting, as the legal high priests did, but sits down in perfect rest, as being satisfied in his full acceptance and virtual possession of all he seeks. He sits on the throne as a royal priest, as a priest on the throne agreeably to the prophecy in Zechariah 6:13: being made to reign to accomplish the ends of the priesthood, according to his own will; for God has given all power in heaven and on earth, that Christ may give eternal life to as many as God hath given him.

Christ is a minister of the sanctuary, and of the true tabernacle, which the Lord pitched, and not man.

In "Christ the Example of Gospel Ministers," Hebrews 8:2 teaches that

The work of ministers in many respects like the work of that Christ himself was appointed to, as the Savior of men; and especially the same with the work which Christ does in his prophetical office; only with this difference, that ministers are to speak and act wholly under Christ, as taught of him, as holding forth his word, and by light and strength communicated from him. Christ himself after his baptism, followed the work of the ministry: he was a minister of the true sanctuary, Hebrews 8:2; he spake and acted as his Father's minister; was a minister of the gospel, and as such preached and administered sacraments. Pastors of churches are ministers of the same gospel; but in their ministry they act as the ministers of Christ. Jesus Christ is the great Bishop of souls; ministers are also bishops under him. Christ came into the world that he might be the light of the world; ministers are set to be lights unto the churches and are also said to be the light of the world, Matthew 5:14. Christ is the bright and morning star; ministers are stars in Christ's hand. Christ is the messenger of the covenant; ministers are called messengers of the Lord of Hosts. Christ is his people's shepherd, the good shepherd, the great shepherd of his sheep. Ministers are also frequently called shepherds, and are directed to feed the flock of Christ, which he purchased with his own blood.

Heb. 8:3-4