464. II. Concubinage conjointly with a wife is altogether unlawful for Christians, and detestable. It is unlawful, because it is contrary to the conjugial covenant; and it is detestable, because it is contrary to religion; and what is contrary to religion, and at the same time to the conjugial covenant, is contrary to the Lord: wherefore, as soon as any one, without a really conscientious cause, adjoins a concubine to a wife, heaven is closed to him; and by the angels he is no longer numbered among Christians. From that time also he despises the things of the church and of religion, and afterwards does not lift his face above nature, but turns himself to her as a deity, who favors his lust, from whose influx his spirit thenceforward receives animation. The interior cause of this apostasy will be explained in what follows. That this concubinage is detestable is not seen by the man himself who is guilty of it; because after the closing of heaven he becomes a spiritual insanity: but a chaste wife has a clear view of it, because she is a conjugial love, and this love nauseates such concubinage; wherefore also many such wives refuse actual connection with their husbands afterwards, as that which would defile their chastity by the contagion of lust adhering to the men from their courtezans.
465. III. It is polygamy which has been condemned, and is to be condemned, by the Christian world. That simultaneous concubinage, or concubinage conjoined with a wife, is polygamy, although not acknowledged to be such, because it is not so declared, and thus not so called by any law, must be evident to every person of common discernment; for a woman taken into keeping, and made partaker of the conjugial bed is like a wife. That polygamy has been condemned, and is to be condemned by the Christian world, has been shewn in the chapter on polygamy, especially from these articles therein:—A Christian is not allowed to marry more than one wife; n. 338: If a Christian marries several wives, he commits not only natural, but also spiritual adultery; n. 339: The Israelitish nation was permitted to marry several wives, because the Christian church was not with them; n. 349. From these considerations it is evident, that to adjoin a concubine to a wife, and to make each a partner of the bed, is filthy polygamy.
466. IV. It is an adultery whereby the conjugial principle, which is the most precious Jewel of the Christian life is destroyed. That it is more opposed to conjugial love than simple adultery; and that it is a deprivation of every faculty and inclination to conjugial life, which is implanted in Christians from birth, may be evinced by arguments which will have great weight with the reason of a wise man. In regard to the first position,—that simultaneous concubinage, or concubinage conjoined with a wife, is more opposed to conjugial love than simple adultery, it may be seen from these considerations:
