The high priest took blood of animal into the Holy Place to sanctify it because of the uncleanness of Israel,
Then he shall kill the goat of the sin offering, which is for the people, bring its blood inside the veil, do with that blood as he did with the blood of the bull, and sprinkle it on the mercy seat and before the mercy seat. So he shall make atonement for the Holy Place, because of the uncleanness of the children of Israel, and because of their transgressions, for all their sins; and so he shall do for the tabernacle of meeting which remains among them in the midst of their uncleanness. There shall be no man in the tabernacle of meeting when he goes in to make atonement in the Holy Place, until he comes out, that he may make atonement for himself, for his household, and for all the assembly of Israel (Leviticus 16.15–17).
Jesus as our high priest went into the Holy Place with His own blood, providing cleansing,
But into the second part the high priest went alone once a year, not without blood, which he offered for himself and for the people’s sins committed in ignorance; the Holy Spirit indicating this, that the way into the Holiest of All was not yet made manifest while the first tabernacle was still standing. It was symbolic for the present time in which both gifts and sacrifices are offered which cannot make him who performed the service perfect in regard to the conscience—concerned only with foods and drinks, various washings, and fleshly ordinances imposed until the time of reformation. But Christ came as High Priest of the good things to come, with the greater and more perfect tabernacle not made with hands, that is, not of this creation. Not with the blood of goats and calves, but with His own blood He entered the Most Holy Place once for all, having obtained eternal redemption. For if the blood of bulls and goats and the ashes of a heifer, sprinkling the unclean, sanctifies for the purifying of the flesh, how much more shall the blood of Christ, who through the eternal Spirit offered Himself without spot to God, cleanse your conscience from dead works to serve the living God? (Hebrew 9.7–14).
Now we no longer have need of the earthly and all its sacrifices, because the sacrifice of Jesus replaced all those sacrifices, but not just replacing them, His single sacrifice superseded them, bringing us forgiveness of sins, a New Covenant, and the hope of eternal life with our Heavenly Father.
Jesus is the Messiah.