1Cor 7, 12-17 God has called you to peace

(1Cor 7, 12-17) God has called you to peace

[12] To the rest I say (not the Lord): if any brother has a wife who is an unbeliever, and she is willing to go on living with him, he should not divorce her; [13] and if any woman has a husband who is an unbeliever, and he is willing to go on living with her, she should not divorce her husband. [14] For the unbelieving husband is made holy through his wife, and the unbelieving wife is made holy through the brother. Otherwise your children would be unclean, whereas in fact they are holy. [15] If the unbeliever separates, however, let him separate. The brother or sister is not bound in such cases; God has called you to peace. [16] For how do you know, wife, whether you will save your husband; or how do you know, husband, whether you will save your wife? [17] Only, everyone should live as the Lord has assigned, just as God called each one. I give this order in all the churches.

(CCC 1637) In marriages with disparity of cult the Catholic spouse has a particular task: "For the unbelieving husband is consecrated through his wife, and the unbelieving wife is consecrated through her husband" (1 Cor 7:14). It is a great joy for the Christian spouse and for the Church if this "consecration" should lead to the free conversion of the other spouse to the Christian faith (Cf. 1 Cor 7:16). Sincere married love, the humble and patient practice of the family virtues, and perseverance in prayer can prepare the non-believing spouse to accept the grace of conversion. (CCC 2387) The predicament of a man who, desiring to convert to the Gospel, is obliged to repudiate one or more wives with whom he has shared years of conjugal life, is understandable. However polygamy is not in accord with the moral law." [Conjugal] communion is radically contradicted by polygamy; this, in fact, directly negates the plan of God which was revealed from the beginning, because it is contrary to the equal personal dignity of men and women who in matrimony give themselves with a love that is total and therefore unique and exclusive" (FC 19; cf. GS 47 § 2). The Christian who has previously lived in polygamy has a grave duty in justice to honor the obligations contracted in regard to his former wives and his children.