What does the Bible say about Jesus as our high priest?

In Hebrews 5:1-11, Jesus is portrayed as the ultimate high priest, appointed by the Father and unlike any earthly priest. He is the only one who can represent us before God, offering not just temporary sacrifices for sins, but himself as the once-for-all sacrifice. This distinction is emphasized as he is a priest in the order of Melchizedek, which indicates a priesthood that is eternal and unchangeable, setting him apart from the Levitical priests who could only offer temporary measures for forgiveness.