What does the Bible say about the priestly work of Christ?

The book of Hebrews elaborates on the priestly work of Christ, emphasizing that He is the appointed high priest who represents us before God. In Hebrews 9:11-12, we see that Christ entered into the holy place not with the blood of goats and calves but with His own blood, thus obtaining eternal redemption for us. This underscores the unique glory of His office, His sacrifice, and the fulfillment of the Old Testament priesthood's symbolism through His one-time offering, which perfectly atones for sin.