But if we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus Christ, his Son, cleanses us from all sin.
The sum of what is said, then, is, that the faithful know of a certainty, that they are accepted by God, because he has been reconciled to them through the sacrifice of the death of Christ. And sacrifice includes cleansing and satisfaction. Hence the power and efficiency of these belong to the blood of Christ alone. 