Wherefore, holy brethren, partakers of the heavenly calling, consider the Apostle and High Priest of our profession, Christ Jesus; Hebrews 3:1
As we study the Old Testament we see God ordained a line of High Priests, they were from the Aaronic bloodline. When we understand the role of these men, we also get a deeper understanding of who Jesus is, our High Priest.
The High Priest in the Old Covenant , was the mediator between the Israelites and God. Unless you were a Prophet, who very few were, God did not speak to you directly. The only presence of God , at this time, was in the Holy Temple in Jerusalem. If you wanted to be in Gods presence , you must go to the Temple and have the High Priest offer a sacrifice of atonement for your sin.
There was also a curtain or veil in the Temple, that separated the Israelites from the Presence of God in the Temple. The only one who could go behind that curtain was the High Priest, and this was only if that Priest was spiritually and physically “clean” at the time. If a HIgh Priest tried to go in the presence of God in a sinful state, he was immediately struck down by God, why? Because the holiness of God is beyond our human nature.
When Jesus came, he changed all of this. By Him being our High Priest, we can now go directly into the presence of God, Jesus is our Mediator between the Father. We have been declared righteous and justified because Jesus paid the atonement for our sins on the cross. While Jesus was on the cross, the Veil was Torn, as Jesus declared “It Is Finished” meaning we can now go into the Presence of God because of Christ
Jesus foretold that he would destroy and raise “The Temple” up after 3 days (John 2) Of course Jesus was referring to his physical body, his death and resurrection fulfilled it all. No longer do we need to go to a physical temple as he foretold the woman at the well (John 4) But we now worship God in spirit and truth because Jesus paid it all
Finally , Jesus sent the Holy Spirit, the presence of God now lives inside of us, as our bodies are now the Temple of God. Once you understand all of this, you understand how Jesus is our High Priest, the Priests above all Priests. Jesus paid it all so we can be reconciled back to the Father, Amen!