" But if it is perfectly clear, from what was lately said, that the blood of Christ is the only satisfaction, expiation, and cleansing for the sins of believers, what remains but to hold that purgatory is mere blasphemy, horrid blasphemy against Christ? I say nothing of the sacrilege by which it is daily defended, the offenses which it begets in religion, and the other innumerable evils which we see teeming forth from that fountain of impiety. "

― John Calvin , Institutes of the Christian Religion, 2 Vols