John Calvin Commentary Romans 3:7

"But if the truth of God through my lie abounded unto his glory, why am I also still judged as a sinner?" — Romans 3:7 (ASV)

If indeed the truth of God, etc. This objection, I have no doubt, is presented as if spoken by an ungodly person; for it is a sort of explanation of the previous verse and would have been connected with it, had not the Apostle, moved with indignation, broken off the sentence in the middle. The meaning of the objection is — “If by our unfaithfulness the truth of God becomes more conspicuous, and in a way confirmed, and consequently more glory results for him, it is by no means just that one, who serves to display God’s glory, should be punished as a sinner.”