Who is Jesus?
Hebrews 5:5 So also Christ did not exalt himself to be made a high priest, but was appointed by him who said to him,“You are my Son, today I have begotten you”
In the days of the Old Testament priests, a sacrifice was made on behalf of the people by the High Priest. This would atone for their sins for the period of one year. In this way the priest brought God and man together.
Jesus is the perfect High Priest because He serves as both the priest and the sacrifice. He brings God and man together by the shedding of His own blood, not that of an animal. The sacrifice of this perfect Lamb is once and for all, not just to atone for a limited period of time.
Jesus didn’t appoint Himself to the position of High Priest, but He’s the only one who can fill the role perfectly. Unlike all other High Priests who had to offer sacrifices for their own sins as well as those of the people, Jesus can atone for our sins by offering His own life in the place of ours. And that’s just what He did.