John Chrysostom
Why did he say, "And almost everything"? Why did he make such a limitation? Because there was not perfect cleansing or perfect remission of sins there, but something half-complete, and indeed much less. But here, "For this is My Blood," says the Lord, "of the New Covenant, which is shed for many for the remission of sins" (Mt 26:28). Where is the book that cleansed their souls? They themselves were the books of the New Covenant. Where are the vessels of service? They themselves. Where is the tabernacle? Again, they themselves. "I will dwell in them," God says, "and walk among them" (2 Cor 6:16). But here there is no sprinkling with scarlet wool or hyssop. Why? Because this cleansing was not bodily, but spiritual, and this blood is spiritual. Why?
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Because it flowed not from the body of irrational animals, but from a body fashioned by the Spirit. Moses did not sprinkle us with this blood, but Christ did, through the word He spoke: "This is My Blood of the New Covenant, which is shed for many for the remission of sins." This word, soaked with blood in place of hyssop, sprinkles all. There the body was cleansed outwardly, since the cleansing was bodily. Here the cleansing is spiritual. It enters the soul and cleanses it, not only by sprinkling, but by becoming a fountain in our souls. Those initiated into the mysteries know what I mean. There the surface of the body was sprinkled, and the one sprinkled washed again. He did not always go about bloodstained. Here it is not so. The blood mingles with the very substance of the soul, making it strong and pure, and bringing it to ineffable beauty. Thus the Apostle proves that death served not only for confirmation, but also for cleansing. Death, and especially death on the cross, seemed to be something ruinous. But the Apostle says that it served for cleansing, a great cleansing, and in exalted matters. For this, that is, for the sake of this blood, the sacrifices existed before. For this the lambs existed. For this everything existed.