What does it mean that Christ is both the high priest and the sacrifice?

The dual role of Christ as both high priest and sacrifice underscores the uniqueness of His sacrifice. Unlike the high priests of old who offered animal sacrifices, Christ offered Himself, embodying the perfect and sinless offering necessary to atone for human sin. This means that He did not merely represent us before God; He was the very offering that satisfied God's justice. Such an arrangement ensures that there is no need for further sacrifices, as His one-time offering is completely sufficient and effective for the redemption of His people, emphasizing the grace and sovereignty of God in salvation.