See that ye refuse not Him that speaketh. – Hebrews 12:25

Do you not hear it? If you take away the blood of sprinkling from the gospel, you have silenced it. It has no voice if this is gone. “Oh,” they say, “the gospel has lost its power!” What wonder when they have made it a mute gospel! How can it have power when they take away that which is its life and speech? Unless the preacher is evermore preaching this blood, and sprinkling it by the doctrine of faith, his teaching has no voice either to awaken the careless or to cheer the anxious. If ever there should come a wretched day when all our pulpits shall be full of modern thought, and the old doctrine of a substitutionary sacrifice shall be exploded, then will there remain no word of comfort for the guilty or hope for the despairing. Hushed forever will be those silver notes which now console the living, and cheer the dying, a mute spirit will possess this sullen world, and no voice of joy will break the blank silence of despair.

What a voice there is in the blood of sprinkling, since indeed it is the voice of the eternal Son of God, who both makes and destroys! Would you have me silence the doctrine of the blood of sprinkling? Would any one of you attempt so horrible a deed? Shall we be censured if we continually proclaim the heaven-sent message of the blood of Jesus? Shall we speak with bated breath because some affected person shudders at the sound of the word “blood?” or some “cultured” individual rebels at the old-fashioned thought of sacrifice? No, verily, we will sooner have our tongue cut out than cease to speak of the precious blood of Jesus Christ. For me there is nothing worth thinking of or preaching about but this grand truth, which is the beginning and the end of the whole Christian system, namely, that God gave His Son to die that sinners might live. This is not the voice of the blood only, but the voice of our Lord Jesus Christ Himself. So says the text, and who can contradict it? ~ C.H. Spurgeon

https://www.blueletterbible.org/comm/spurgeon_charles/sermons/1888.cfm