Albert Barnes Commentary Hebrews 10:18

"Now where remission of these is, there is no more offering for sin." — Hebrews 10:18 (ASV)

Now where remission of these is. Remission or forgiveness of sins; that is, of the sins mentioned in the previous verse.

There is no more offering for sin. If those sins are entirely blotted out, there is no more need of sacrifice to atone for them, just as there is no more need to pay a debt again that has already been paid. Paul's idea is that in the Jewish dispensation, there was a constant repetition of the remembrance of sins by the sacrifices that were offered; but under the Messianic dispensation, sin would be entirely canceled.

There would be one great and all-sufficient sacrifice; and when there was faith in that offering, sin would be absolutely forgiven. If that was the case, there would be no need for any further sacrifice for it, and the offering need not be repeated. This circumstance, which the apostle emphasizes so much, made a very important difference between the new covenant and the old.

In the one, sacrifices were offered every day; in the other, the sacrifice once made was final and complete. In the one case, forgiveness was not so complete as to prevent the offender from being constantly reminded of his sins by the necessary repetition of sacrifice; in the other, the pardon was so complete that all dread of wrath was taken away, and the sinner might look up to God as calmly and joyfully as if he had never been guilty of transgression.