It is unlawful, because it is contrary to the marriage compact, and detestable because it is contrary to religion. Anything contrary to both of these is contrary to the Lord. So as soon as anyone without a genuinely weighty reason takes a concubine in addition to a wife, he finds heaven shut and the angels strike him off the roll of Christians. From then on he rejects everything to do with the church and religion, and no longer lifts his gaze above nature, but turns towards it as a power which approves his lust, and thereafter his spirit is animated* by its influence. The reason for this apostasy will be revealed later. The man himself does not see how detestable this is, because when heaven is closed to him spiritual folly takes over. But a chaste wife perceives it, because she is conjugial love, and this love is nauseous to it. Many wives therefore refuse afterwards to have sexual relations with their husbands, as if it would pollute their chastity by being infected with the lust which clings to the husband from his contact with prostitutes. * Reading animatur for animat.