" Many treated his sudden conversion to Christianity with profound suspicion and more than a little distaste. This man of ‘evil disposition’ and ‘vicious inclinations’ had converted, wrote one non-Christian historian, not because of any burning heavenly crosses but because, having recently murdered his wife (he had – allegedly – boiled her in a bath because of a suspected affair with his son), he had been overcome by guilt. Yet the priests of the old gods were intransigent: Constantine was far too polluted, they said, to be purified of these crimes. No rites could cleanse him. At this moment of personal crisis Constantine happened to fall into conversation with a man who assured him that ‘the Christian doctrine would teach him how to cleanse himself from all his offences, and that they who received it were immediately absolved from all their sins’. Constantine, it was said, instantly believed. "

― Catherine Nixey , The Darkening Age: The Christian Destruction of the Classical World