A Complete Bible Study on The Role of the High Priest
The high priest can seem like a figure from a world far removed from ours. Yet when I follow this office from Exodus into Hebrews, it explains why sinners cannot approach God on their own terms. It also shows how the old priesthood pointed toward Jesus, the only Mediator we need.
God Appointed the High Priest
Leviticus tells us how priests were set apart and clothed for service. It follows their work at the altar and explains why incense, blood, and the veil belonged to Israel’s worship. Those details can feel distant from modern life, but God did not fill Scripture with ancient ceremony for its own sake. He was teaching Israel the seriousness of sin and the perfection of His holiness. Sinners may draw near to Him only through the way He appoints.
Israel had many priests, but only one man served as high priest at a time. God chose Aaron, the brother of Moses, as the first high priest and set apart Aaron’s sons to continue the priestly line. The other priests offered sacrifices and cared for the sanctuary. The high priest carried a special responsibility to represent the entire nation. Only he could enter the Most Holy Place, and he did so only on the annual Day of Atonement with the blood God required.
The priesthood was not a religious system Israel invented. God assigned sanctuary service to the tribe of Levi and selected Aaron’s family within that tribe. Aaron did not seize the office, and Moses did not design it from his own imagination. The LORD appointed it. This teaches us from the beginning that sinful people cannot create their own access to God.
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
God supplied everything named in the command. He identified the priest, then provided what Aaron needed to be clothed and anointed for service. God also specified the sacrifices and the bread used in the consecration. Before Aaron could minister, the mediator and every part of his approach existed by God’s appointment. The pattern points forward to the gospel, where God provides both the Priest and sacrifice in His own Son.
Exodus says that the priests were to be hallowed for ministry. The Hebrew verb is qadash, meaning to set apart, hallow, or consecrate. This did not make Aaron sinless. It marked him as set apart for God’s service, while the sacrifices in the same ceremony showed that he still needed atonement.
“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 animals had to be without blemish. God was teaching Israel that guilt could not be dealt with through a polluted substitute. Sin deserves death, so the sacrifice offered under His command had to be clean. Those animals did not complete redemption, but they taught the deadly seriousness of sin and the need for blood atonement. Jesus is different from Aaron because He is holy in Himself and completely without sin.
The Aaronic ministry was real and necessary under the Mosaic Law, yet it was never God’s final answer to sin. Paul explains in Hebrews that Jesus Christ is the great High Priest. He is not simply a better Aaron. He is the eternal Son of God who became truly human without ceasing to be divine. He remained sinless and holds an eternal priesthood after the order of Melchizedek.
Instead of bringing an animal that could never perfect the conscience, Jesus offered Himself once for all. He entered the true heavenly sanctuary on the basis of His own blood and then sat down at God’s right hand. An Aaronic priest remained standing because another sacrifice would soon be needed. Christ sat down because no further sacrifice for sin remains.
The Tabernacle, the Garments, and Representation
The tabernacle was the portable sanctuary Israel carried through the wilderness. Its layout taught through space and boundaries. An Israelite worshiper could enter the outer court, but only priests served in the first room, called the Holy Place. A heavy veil separated that room from the inner chamber, the Most Holy Place. Access became more restricted as a person approached the place of God’s special presence.
This boundary was not cruelty. God chose to dwell among His people, but His nearness did not make sin harmless. The veil told the truth that sinners could not rush into His presence on their own terms.
The ark of the covenant stood behind the veil. It was a gold-covered chest that held the Testimony, including the covenant tablets given to Moses. The gold cover was called the mercy seat, and cherubim overshadowed it. God promised to meet with Israel’s representative there.
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 mercy seat and the veil belong together. The mercy seat shows that God desired to dwell among His people and speak to them. The veil shows that sin had created a real barrier. We cannot keep one truth and discard the other. God is merciful, and He is holy. Drawing near requires the atonement He provides.
This keeps worship from becoming a vague feeling of closeness to God. His kindness does not give us permission to ignore His holiness. The old covenant gave Israel a true but temporary way to approach, and every boundary reminded the people that access rested on God’s terms. The new covenant does not make holiness less serious. It gives the fulfillment of that access in Christ.
The high priest’s garments added another part of the lesson. They were not designed merely to display status or beauty. Through them, God showed how the priest represented Israel before Him. Aaron entered the sanctuary as the appointed representative of the nation rather than as a private man.
The garments displayed the beauty God appointed for worship, but they also carried the language of holiness and judgment. Their design kept the office from becoming a platform for Aaron’s personality. Every piece belonged to the ministry God had defined, and the engraved names showed whom the high priest was there to represent.
The names of Israel’s tribes were engraved on two onyx stones attached to the shoulders of the ephod.
“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
Aaron visibly bore their names before the LORD. The people were not reduced to an unnamed crowd; every tribe was represented in the place God had commanded. The breastplate brought the picture even closer, because the names were over Aaron’s heart when he entered the holy place.
“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
The shoulders suggest the weight of representation, while the heart shows personal care. Yet Aaron could carry only their names into an earthly sanctuary. He could not cleanse anyone’s conscience forever. Jesus represents His people through His finished work and perfect righteousness, then continues to care for them through His living intercession.
I find the personal nature of this picture especially encouraging. Israel appeared before God by name through the representative He appointed. The image does not mean Aaron could save the tribes, but it prepares us to understand that Christ’s priestly care is not distant or anonymous. The One who opened the way also knows those who come through Him.
Blood and the Day of Atonement
The sacrificial system centers upon a truth modern people often resist: sin deserves death. God never taught Israel that sincerity or self-improvement could heal guilt. He 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
The words “I have given it to you” should not be overlooked. Israel did not bribe God into mercy. God Himself provided the blood atonement He required. Those sacrifices were accepted within their covenant setting, but they pointed beyond themselves because animal blood could not finally remove sin.
The Hebrew verb kaphar can mean to cover or to make atonement. In Leviticus, the word belongs to God’s appointed blood provision for guilt. It does not describe God pretending that sin did not exist. The life of the flesh was in the blood, and a substitute died under His command. The language must be understood in that sacrificial setting before we carry it forward to Christ’s greater atonement.
The clearest picture of the high priest’s role appears on the Day of Atonement in Leviticus 16. The chapter begins by recalling the death of Aaron’s sons Nadab and Abihu after they approached the LORD in a way He had not commanded. Aaron therefore could not enter the Most Holy Place whenever he wished. He went once a year under the exact conditions God gave, bringing sacrificial blood while a cloud of incense covered the mercy seat.
Aaron first offered a sacrifice for himself and his household because he was also a sinner. Only then could he act for the nation. He took the blood of the people’s sin offering behind the veil and sprinkled it as God commanded. Atonement was made for the sanctuary and altar as well as for the priesthood and congregation. Even Israel’s worship was touched by the uncleanness of a sinful people and needed God’s appointed cleansing.
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 9:7 gathers the pattern into one verse. The high priest went alone because access was restricted. He entered only once a year because the way had not yet been opened in fullness. Blood was necessary because sin required atonement, and the mediator offered for himself because he too needed mercy.
Leviticus 16 also describes two goats. One was killed as the sin offering. The other was sent away into the wilderness. Together they pictured atonement and removal. Sin had to be dealt with before God, and then guilt was shown as being carried away from the people.
The day returned every year, so repetition was built into the calendar. That was not a failure in God’s instruction. It was part of what He was teaching. If those sacrifices had perfected worshipers forever, they would have stopped. Their repetition announced that something better was still needed.
Christ’s blood cannot be reduced to poetic decoration. Jesus physically bore the punishment for our sins in His innocent body through real torture, the shedding of His blood, and death. The Father did not punish, curse, abandon, strike, bruise, or pour wrath on Jesus. Wicked men tortured and killed Him as He willingly gave Himself. He rose bodily from the dead. The old sacrifices pointed toward Him, but His sacrifice obtained eternal redemption.
A fuller treatment of this subject appears in A Bible Study on Life Being in the Blood.
From Aaron to the Order of Melchizedek
The old priesthood was holy because God appointed it, but it remained limited. Its priests were sinners who eventually died and had to be replaced. They served in an earthly sanctuary and offered sacrifices repeatedly. Their ministry pointed toward cleansing without finally cleansing the conscience.
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, so the Law’s priesthood was not meaningless ritual. It was God’s teaching pattern. Still, the shadow was not the substance. Christ is the substance to which it pointed. We should neither dismiss Leviticus as useless nor return to an unfinished system as though Christ’s sacrifice needed to be repeated.
The limits were visible in the priests themselves. No son of Aaron could remain in office forever, so death required one generation to succeed another. The repeated sacrifices also showed that their ministry had not brought final perfection. Christ answers both limits because He lives forever and His one offering does not need a successor.
Jesus did not come from Aaron’s line. He came from the tribe of Judah, and His priesthood belongs to a higher order announced in Psalm 110.
The LORD has sworn And will not relent, “You are a priest forever According to the order of Melchizedek.”
Psalm 110:4
Melchizedek appears in Genesis 14 after Abram rescues Lot. He is both king of Salem, the city later known as Jerusalem, and priest of God Most High. He brings bread and wine, blesses Abram, and receives a tenth from him. Paul uses this scene in Hebrews to show that Melchizedek’s priesthood is greater than Levi’s. In the covenant argument, Levi was represented in his ancestor Abraham when Abraham gave the tenth, and the lesser person was blessed by the greater.
I understand Melchizedek as a Christophany, meaning a pre-incarnate appearance of Christ. Hebrews describes him as king of righteousness and king of peace. Scripture gives neither father, mother, nor genealogy for him. It records no beginning of his days or end of his life and says he was made like the Son of God. This description is why I believe the Christophany reading fits. The details direct our attention to Christ’s eternal priesthood rather than turning Melchizedek into a curiosity. The evidence is examined more fully in A Complete Bible Study on Melchizedek.
For the priesthood being changed, of necessity there is also a change of the law.
Hebrews 7:12
A changed priesthood requires a change in the law tied to that office. Christians do not continue the Levitical system under new names. We come through the Priest God appointed forever. Aaron’s order had many priests because death kept removing them from office. Jesus lives forever and holds an unchangeable priesthood.
This is why the Aaronic and Melchizedek orders cannot be blended together. Aaron’s office belonged to an earthly sanctuary and passed through a family line. Its work had to be repeated under the Mosaic Law. Christ’s priesthood is eternal and cannot pass to another. He fulfills what the old order anticipated rather than taking a temporary place within it.
Jesus Christ, Our Great High Priest
Paul calls believers to hold fast because we have a great High Priest. The word “great” is not decoration. Jesus is greater than Aaron and the earthly sanctuary in which Aaron ministered. He is greater than every repeated sacrifice and every human mediator. The first readers of Hebrews faced pressure to draw back, so Paul directs them away from their own courage and toward the Priest who has already 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 into the true presence of God. He is Jesus, truly human, and He is the Son of God, truly divine. Because of who He is, He can represent us and bring us to God.
For there is one God and one Mediator between God and men, the Man Christ Jesus,
1 Timothy 2:5
There is one Mediator, and that is good news for a guilty conscience. Access to God is not divided between Christ and our recent spiritual performance. We never come partly through Jesus and partly through our own record. We come entirely through Him.
Jesus can also sympathize with weakness. His sinlessness does not make Him cold or distant; it makes Him qualified to save. A fellow sinner cannot rescue sinners from sin, but the sinless Savior can.
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 sympathy leads to a direct invitation:
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
Boldness is not irreverence. It is open confidence in the Priest God provided. We come because Christ has opened the way, and there we find mercy for failure and grace in weakness.
At the death of Jesus, the veil in the Jerusalem temple was torn from top to bottom. The direction is important. Humanity did not climb into God’s presence or tear the boundary open from below. God opened the way through the death of His Son.
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
Hebrews explains that believers now have boldness to enter the Holiest by the blood of Jesus through 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
The way is new because the old order has been fulfilled. It is living because Christ rose from the dead. Hebrews identifies the veil with His flesh because His body was truly given, and the way is opened by His blood because atonement is not merely an idea. Jesus died for sinners and rose again.
Paul therefore tells believers to draw near with 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 taking God at His word about His Son. Many believers measure their access by how well they performed during the week. Hebrews directs the conscience to Christ’s blood instead. The veil is open because Jesus finished the work, not because we finally reached a good enough spiritual mood.
His Intercession and the Believer’s Priesthood
Christ’s sacrifice is finished, while His priestly care continues. He is able to save to the uttermost because He always lives to represent those who come to God through Him.
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
Intercession does not mean the Son must persuade an unwilling Father to be kind. The Father sent Him, and Jesus willingly gave Himself. The Holy Spirit applies that finished work, so every part of salvation displays God’s united purpose. Christ’s intercession is His continuing priestly representation of His people on the basis of a sacrifice already complete.
John uses the related language of advocacy. When believers sin, they must not pretend nothing happened. They also do not need to hide in despair. They have an Advocate with the Father, Jesus Christ the righteous.
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.
1 John 2:1-2
John writes so believers will not treat sin lightly. Yet when a believer does sin, Christ does not need to be offered again. He is the righteous Advocate whose completed sacrifice is the propitiation for our sins. Propitiation means that His sacrifice satisfies God’s righteous judgment against sin. God does not ignore evil, and Jesus does not suffer repeatedly.
The remainder of 1 John 2:2 preserves the whole-world scope of Christ’s provision. Jesus died for every person, and God’s offer of salvation is genuine even though people can resist and finally reject Him. Those who repent and believe are forgiven and born again. The Holy Spirit comes to live within them and seals them for the day of redemption. Christ saves every genuine believer to the uttermost, making that believer eternally secure. Security never permits lawlessness, and a shallow profession without new life does not prove that a person belongs to Christ.
A fuller examination of salvation appears in Soteriology: The Study of Salvation.
The New Testament calls believers a holy priesthood, but that does not mean Christians offer sacrifices for sin. Christ’s sin offering is finished. Because they have received mercy, believers now offer worship and praise through Jesus Christ. Their prayers and daily obedience also rise through Him.
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
The phrase “through Jesus Christ” guards the entire idea. The believer’s priesthood is not independent access based on personal worthiness. We come to God because Christ brought us near, and we serve because He cleansed us.
Our spiritual sacrifices are therefore responses to mercy, not payments for guilt. Praise rises through Christ, and so do prayer and daily obedience. Service and generosity can please God because believers offer them through the Mediator who has already made them acceptable. None of these acts adds anything to the sin offering.
No earthly priest or pastor can repeat Christ’s sacrifice or become a second mediator for sin. A church or ritual cannot complete His atonement either. Church leaders serve God’s people by teaching and shepherding them, and they rightly pray for those in their care. Baptism is a precious act of obedience, while communion keeps Christ’s sacrifice before the church in remembrance. Neither ordinance repeats the cross. Jesus offered Himself once for all.
Leviticus should therefore make us reverent rather than bored. Its boundaries and sacrifices teach that worship is not self-expression on whatever terms we prefer. At the same time, Hebrews gives the believer settled confidence. Anyone who is in Christ may confess sin honestly and come for mercy without standing outside the veil in fear.
The old garments and washings also remind us that holiness is not casual. Bold access does not mean careless access. The price of the open way was the blood of the Son of God. Reverence grows when we understand what it cost for guilty people to draw near.
Christ’s blood should also produce gratitude rather than vague religious admiration. Leviticus 17:11 says that God gave blood on the altar to make atonement, and Hebrews says that Christ obtained eternal redemption through His own blood. The cross was not only an example of love. Jesus truly bore our sins and gave His life.
This gives a believer confidence that does not depend on denying failure. We may come to the throne of grace precisely because mercy and help are needed. Recent obedience cannot create that access, and recent failure cannot close a way Christ opened by His finished sacrifice.
The high priest also protects the church from false mediation. Faithful ministry keeps pointing people to Jesus instead of claiming part of His place. Our worship is a response to a completed sin offering rather than payment toward our guilt. Christ has already done what no earthly priest or religious institution could do.
That completed offering gives Christian service its proper place. Our praise and prayer do not help finish atonement. Neither do our generosity or obedience. We respond because the great High Priest has already brought us near. Worship becomes the grateful life of a people whose guilt has been addressed and whose Mediator lives forever.
My Final Thoughts
After following the high priest from Leviticus into Hebrews, I do not see a discarded religious office but a God-given lesson that reaches its fulfillment in Jesus Christ. Aaron carried Israel’s names and entered an earthly sanctuary with blood, yet he remained a sinner whose service had to be repeated. Jesus is the sinless and eternal High Priest who offered Himself once for all and opened the way into God’s presence. I can draw near with reverence and confidence because my access rests on His blood rather than on my recent performance. There is no other mediator to add, and there is no unfinished sacrifice left for us to complete.