The phrase a great High Priest is seen only once in the Word of God. Our great High Priest is Jesus Christ. He is great in comparison to the Aaronic priesthood.
The great High Priest is superior because of the efficacy of the sacrifice He offered. It was a sacrifice where He Himself bled and died. By His death and shedding of His blood, a permanent solution for sin was obtained. The ritualistic sacrifices of the Aaronic priesthood were unable to accomplish this. There was a continual repetition of these sacrifices of bulls and goats. Heb. 10:4. The blood of bulls and goats brought a temporary reprieve from God’s judgment. Jesus by His one sacrifices ended the Levitical sacrifices.
The great High Priest is superior because of where His blood was sprinkled. Heb. 9:12. Aaronic priesthood could only pass through the veil and sprinkle the mercy seat on the Ark of the Covenant with the blood of bulls and goats. Jesus by His sacrifice of Himself took His own blood and passed through the heavens into the very presence of God. The wrath of God was appeased against sin, for anyone who believes in the death and resurrection of the Lord Jesus Christ. Jesus died a sacrificial death for sinners. If only the sinner will believe, he will be forgiven of his sins and find eternal life. Have you believed on Jesus Christ for the remission of your sins. If you have not done so do it now.