A Complete Bible Study on The Role of the High Priest

Leviticus lays out a system that can feel far away from modern life: priests, garments, anointing oil, animals, blood, and a tabernacle. But God was not filling pages with ancient religious trivia. In passages like Leviticus 8:1-2, He was teaching His people, and us, how a holy God makes a way for sinful people to draw near, and why we need a mediator God appoints, not one we invent.

God Appointed a Priest

The priesthood was not Israel’s bright idea. God commanded it. Access to God is not something we design. We do not walk into His presence on our own terms, with our own rules, and call it worship. God sets the terms, and He does it for our good.

Leviticus 8 opens with the Lord speaking to Moses and telling him exactly what to bring and who to bring. Aaron does not volunteer himself. Moses does not improvise. God starts by giving instructions.

And the LORD spoke to Moses, saying: "Take Aaron and his sons with him, and the garments, the anointing oil, a bull as the sin offering, two rams, and a basket of unleavened bread; (Leviticus 8:1-2)

That is easy to skim past, but it is important: before Aaron ever puts on a garment or offers a sacrifice, God is already providing what will be needed for the whole act of drawing near. Even the mediator comes by God’s appointment and by God’s provision. That already points you toward the gospel, where God provides the Mediator and the sacrifice.

Set apart for service

Exodus explains that this process was to hallow the priests, meaning to set them apart for ministry.

"And this is what you shall do to them to hallow them for ministering to Me as priests: Take one young bull and two rams without blemish, (Exodus 29:1)

The Hebrew verb behind hallow is tied to holiness. It does not mean Aaron became sinless. It means he was marked off for God’s use. He belonged to the Lord in a special, public way for a specific job.

The offerings also had to be without blemish. God was teaching His people that you do not deal with sin using leftovers, shortcuts, or polluted substitutes. If a substitute stands in for guilt, it must be clean. That requirement was a constant sermon: God is holy, and approaching Him is serious business.

A mediator is needed

A mediator stands between two parties to bring them together. Under the Law, the high priest stood between sinful people and a holy God. He represented the people before God, and he carried out sacrifices that dealt with guilt and uncleanness. It was real ministry, but it was also limited and temporary.

This helps keep you from reading Leviticus like it is mainly about religious leadership. God was building in a lesson: sinners do not simply stroll into His presence. If they come, it will be by His mercy, using His way.

The tabernacle taught limits

The layout of the tabernacle reinforced the message. There was an outer court, then the holy place, then the most holy place. The closer the space was to God’s special presence, the more restricted it became. God was not teasing them. He was telling the truth: He is pure, and they were not.

God promised to meet with His people at the mercy seat, but it sat behind a veil.

You shall put the mercy seat on top of the ark, and in the ark you shall put the Testimony that I will give you. And there I will meet with you, and I will speak with you from above the mercy seat, from between the two cherubim which are on the ark of the Testimony, about everything which I will give you in commandment to the children of Israel. (Exodus 25:21-22)

The veil was a built-in boundary. It preached without words: you cannot come your own way. At the same time, the mercy seat preached something else: God did want to dwell among His people. The system held those two truths together, God’s desire to be with His people and man’s need to be cleansed to be near Him.

What the Priest Did

Once God appoints the high priest, Scripture shows the duties that go with that office. Two themes keep coming up: the high priest represented the people, and the high priest dealt with sin through God-appointed sacrifices. When you get to the New Testament, those themes land squarely on Jesus.

Carrying names

God commanded special garments for the high priest, and those garments were not about style. They were visual teaching tools. The names of Israel were carried on stones on his shoulders.

"Then you shall take two onyx stones and engrave on them the names of the sons of Israel: six of their names on one stone and six names on the other stone, in order of their birth. With the work of an engraver in stone, like the engravings of a signet, you shall engrave the two stones with the names of the sons of Israel. You shall set them in settings of gold. And you shall put the two stones on the shoulders of the ephod as memorial stones for the sons of Israel. So Aaron shall bear their names before the LORD on his two shoulders as a memorial. (Exodus 28:9-12)

Shoulders speak of bearing a load. Aaron came as the appointed representative of the people. He did not walk in only as a private man with a private faith. He was publicly carrying others.

Then the breastpiece put the names over his heart.

"So Aaron shall bear the names of the sons of Israel on the breastplate of judgment over his heart, when he goes into the holy place, as a memorial before the LORD continually. (Exodus 28:29)

God wanted His people to know they were not forgotten. Representation was not cold paperwork. The picture is strength and care, shoulders and heart.

Still, even with all that symbolism, Aaron was only a shadow of what sinners really need. He could carry names into an earthly sanctuary, but he could not cleanse the conscience forever. He could represent them, but he could not change them from the inside out.

Blood and atonement

The sacrifices centered on one hard truth: sin deserves death. A substitute stood in the sinner’s place. Leviticus 17:11 explains that God gave blood on the altar to make atonement.

For the life of the flesh is in the blood, and I have given it to you upon the altar to make atonement for your souls; for it is the blood that makes atonement for the soul.' (Leviticus 17:11)

Atonement in this setting carries the idea of a covering, dealing with guilt in a way God accepts. Under the Law, this was God’s merciful provision so Israel could live in covenant fellowship without pretending sin did not matter.

Do not miss the wording in Leviticus 17:11. God says He gave it. The people did not bribe God into forgiveness. God provided the means. That is grace already showing itself, pointing ahead to the cross where God provides what His justice requires.

The Day of Atonement

The clearest picture of the high priest’s role shows up on the Day of Atonement. Only the high priest entered the most holy place, only once a year, and never without blood. Hebrews looks back at that and explains what it meant.

But into the second part the high priest went alone once a year, not without blood, which he offered for himself and for the people's sins committed in ignorance; (Hebrews 9:7)

Hebrews includes a detail that exposes the weakness of the Aaronic priesthood: the high priest offered for himself too. The mediator was a sinner. He could point toward a solution, but he could not be the final solution.

And it happened again and again. Exodus speaks of atonement being made once a year throughout their generations.

And Aaron shall make atonement upon its horns once a year with the blood of the sin offering of atonement; once a year he shall make atonement upon it throughout your generations. It is most holy to the LORD." (Exodus 30:10)

The repetition was part of the lesson. If the sacrifices had fully and finally removed sin, they would not need to be repeated. The calendar itself reminded the people that a better priest and a better sacrifice were still coming, not a new religious trick, but something God Himself would provide that would truly deal with sin.

Christ Our High Priest

When you come to the New Testament, it does not treat the priesthood as wasted history. It treats it as a real system God used to point forward. Hebrews says the Law had a shadow of the good things to come, not the substance itself.

For the law, having a shadow of the good things to come, and not the very image of the things, can never with these same sacrifices, which they offer continually year by year, make those who approach perfect. (Hebrews 10:1)

A shadow is connected to something real, but it is not the real thing. The Old Testament priesthood was a God-given shadow. Jesus is the substance.

One Mediator

Hebrews calls Jesus a great High Priest who has passed through the heavens.

Seeing then that we have a great High Priest who has passed through the heavens, Jesus the Son of God, let us hold fast our confession. (Hebrews 4:14)

The earthly high priest passed through a veil into a room made with hands. Jesus passed through the heavens. His priestly ministry is tied to the true presence of God, not a copy on earth.

Scripture is also plain that there is one Mediator between God and men, the Man Christ Jesus.

For there is one God and one Mediator between God and men, the Man Christ Jesus, (1 Timothy 2:5)

He is truly man, so He can represent us. He is also the Son of God, so He can bring us to God in a way no mere human priest ever could.

This is where a lot of guilt-ridden believers need to think straight. If there is one Mediator, then your confidence cannot be split between Jesus and your performance. You do not come partly by Him and partly by how good you have been lately. You come by Him.

He helps the weak

Hebrews says Jesus can sympathize with our weaknesses, because He was tempted in all points as we are, yet without sin.

For we do not have a High Priest who cannot sympathize with our weaknesses, but was in all points tempted as we are, yet without sin. (Hebrews 4:15)

That does not mean Jesus faced every modern scenario. It means He faced the real categories of testing that hit human beings: hunger, pain, pressure, loneliness, rejection, weariness, spiritual attack, and the pull to take an easier path than obedience.

His sinlessness does not make Him cold. It makes Him qualified. A drowning man does not need a fellow drowning man. He needs someone who can actually save.

Then Hebrews says we can come boldly to the throne of grace.

Let us therefore come boldly to the throne of grace, that we may obtain mercy and find grace to help in time of need. (Hebrews 4:16)

Boldly is not swagger. The Greek word is about openness, the freedom to speak plainly because you are welcomed. If you belong to Christ, you are not coming to a throne of probation. You are coming to a throne of grace. Mercy is what you need when you have failed. Grace is what you need when you are weak and need help to obey.

Once for all

The heart of the gospel is that our High Priest offered the sacrifice that finally deals with sin. He did not bring the blood of another creature. He offered Himself. Hebrews says He entered the most holy place once for all, having obtained eternal redemption.

But Christ came as High Priest of the good things to come, with the greater and more perfect tabernacle not made with hands, that is, not of this creation. Not with the blood of goats and calves, but with His own blood He entered the Most Holy Place once for all, having obtained eternal redemption. (Hebrews 9:11-12)

Once for all means it is not repeated and it is not improved. Eternal redemption means the rescue is not temporary. This is not a covering that wears off. It is a finished payment that truly frees.

Hebrews later contrasts the priests who stand daily, offering repeatedly, with Jesus who offered one sacrifice for sins forever and sat down.

And every priest stands ministering daily and offering repeatedly the same sacrifices, which can never take away sins. But this Man, after He had offered one sacrifice for sins forever, sat down at the right hand of God, (Hebrews 10:11-12)

Priests stood because the work kept going. Jesus sat down because the work was done. His seated position also shows honor and authority. The risen Christ is not still trying to finish atonement. He reigns with the work completed.

Hebrews also says that by one offering He has perfected forever those who are being sanctified.

For by one offering He has perfected forever those who are being sanctified. (Hebrews 10:14)

Notice the wording. Perfected forever speaks of your standing with God in Christ. That is settled. Being sanctified speaks of God changing your daily life. That is ongoing. So a believer can confess sin honestly without panic. Confession is not a way to get re-saved. It is the family response of a child who belongs to the Father and wants clean fellowship.

The veil opened

When Jesus died, the temple veil was torn from top to bottom.

Then, behold, the veil of the temple was torn in two from top to bottom; and the earth quaked, and the rocks were split, (Matthew 27:51)

From top to bottom tells you God did it. Man did not claw his way into God’s presence. God opened the way through the death of His Son.

Hebrews explains that believers have boldness to enter the holiest by the blood of Jesus, by a new and living way.

Therefore, brethren, having boldness to enter the Holiest by the blood of Jesus, by a new and living way which He consecrated for us, through the veil, that is, His flesh, (Hebrews 10:19-20)

New does not mean the latest religious program. Living means it is connected to a living Savior, not to dead ritual. We come to God based on Christ’s blood, not based on our effort or some priestly system on earth.

Then Hebrews tells us to draw near with a true heart in full assurance of faith.

let us draw near with a true heart in full assurance of faith, having our hearts sprinkled from an evil conscience and our bodies washed with pure water. (Hebrews 10:22)

Full assurance is not pride. It is faith that takes God at His word about what His Son has done. Many Christians carry what Hebrews calls an evil conscience, not because they are secretly worse than everyone else, but because they keep measuring God’s acceptance by their recent track record. The gospel cleanses the record of sin, and it also cleanses the conscience when we rest in Christ’s finished work.

He intercedes

Jesus’ priestly work also continues in intercession.

Therefore He is also able to save to the uttermost those who come to God through Him, since He always lives to make intercession for them. (Hebrews 7:25)

That does not mean He is begging an unwilling Father. The Father and the Son are united in saving those who come to God through Christ. Jesus’ intercession is His ongoing priestly representation of His people in God’s presence on the basis of His finished sacrifice.

John adds that if anyone sins, we have an Advocate with the Father, Jesus Christ the righteous, and that He is the propitiation for our sins.

My little children, these things I write to you, so that you may not sin. And if anyone sins, we have an Advocate with the Father, Jesus Christ the righteous. And He Himself is the propitiation for our sins, and not for ours only but also for the whole world. (1 John 2:1-2)

An advocate is a defender. Jesus is righteous, so there is no stain in Him as He represents us. Propitiation means a sacrifice that satisfies God’s righteous judgment against sin. Sin is not ignored. It is dealt with.

John also says Christ is the propitiation not for our sins only but also for the whole world. That is a big statement. Jesus died for all. His sacrifice is sufficient for all, and the offer is real. Salvation is received by those who come, but nobody is excluded because Christ did not provide enough.

Living with confidence

All of this lands in daily life. You pray with reverence, but you pray with confidence. When temptation hits, you ask for help instead of trying to tough it out alone. When you fail, you confess quickly and get back to walking in the light, refusing the lie that condemnation gets the final word.

Who is he who condemns? It is Christ who died, and furthermore is also risen, who is even at the right hand of God, who also makes intercession for us. (Romans 8:34)

And yes, believers are called a priesthood in the sense of offering spiritual sacrifices through Jesus, not sacrifices for sin. Sin has been handled once for all. Our worship, service, praise, and generosity are responses to mercy, not payments for guilt.

you also, as living stones, are being built up a spiritual house, a holy priesthood, to offer up spiritual sacrifices acceptable to God through Jesus Christ. (1 Peter 2:5)

My Final Thoughts

The high priesthood in the Old Testament was God’s lesson plan. He was teaching that He is holy, that sin creates real separation, and that sinners need a mediator and a sacrifice God Himself provides. Leviticus 8:1-2 is part of that setup, showing a priesthood established by God’s command, with God’s chosen means of consecration and atonement.

Jesus is the fulfillment. He is the great High Priest, without sin, who offered Himself once for all and now lives to intercede for those who come to God through Him. If you are in Christ, draw near with a conscience that rests on His finished work. If you have been leaning on religion, effort, or anything else, lay it down and come to God through the one Mediator, Jesus Christ.