In contrast to the burnt offerings and sacrifices for sin of the old covenant this one sacrifice is effective. The old covenant offerings at best sanctified to the purifying of the flesh (9:13), but Christ’s offering up himself sanctifies us, body and soul.
What greater blessing could we receive than to have sin removed from us. It is not simply removed from the flesh, as if only the outer part of us had been affected by it. Sin has found its way into the centre of our being and mixed itself with our nature with the result that we are become sinners and there is nothing that we could do in all eternity to change that. But God will have so thoroughly removed sin from us that there is not trace of it, and we come forth sanctified, loving God with all our hearts, and hating sin the more because it once enslaved us.