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.
Hereby is disproved and exposed the sacrilegious invention of the Papists as to indulgences; for as though the blood of Christ were not sufficient, they add, as a subsidy to it, the blood and merits of martyrs. At the same time, this blasphemy advances much further among us; for as they say that their keys, by which they hold as shut up the remission of sins, open a treasure made up partly of the blood and merits of martyrs, and partly of the worlds of supererogation, by which any sinner may redeem himself, no remission of sins remains for them but what is derogatory to the blood of Christ; for if their doctrine stands, the blood of Christ does not cleanse us, but comes in, as it were, as a partial aid. Thus consciences are held in suspense, which the Apostle here bids to rely on the blood of Christ. 