In looking at the sanctifying power of the blood of Jesus, we want to examine a passage from Hebrews that speaks about the apostate—the person who turns away from the Christian faith, having known it, into a deliberate denial and rejection of the Lord Jesus Christ. It speaks about all the sacred things that he renounces and, in a sense, defiles:
Of how much worse punishment, do you suppose, will he be thought worthy who has trampled the Son of God underfoot, counted the blood of the covenant by which he was sanctified a common [or unholy] thing, and insulted the Spirit of grace? (Hebrews 10:29)
It is plain to see from this verse that we are sanctified by the blood of the covenant. But here is a person who has been sanctified by the blood of the New Covenant and then turns back. Let’s look closely at the meaning of trampling underfoot the blood of Jesus. This reference is in relation to the Passover ceremony, where the blood was applied to the lintel and the doorposts, but never to the threshold. We are never to show disrespect for the blood of Jesus.