I Corinthians 7:15

if . . . depart--that is, wishes for separation. Translate, "separateth himself": offended with her Christianity, and refusing to live with her unless she renounce it. brother or a sister is not under bondage--is not bound to renounce the faith for the sake of retaining her unbelieving husband [HAMMOND]. So Deu 13:6; Mat 10:35-37; Luk 14:26. The believer does not lie under the same obligation in the case of a union with an unbeliever, as in the case of one with a believer. In the former case he is not bound not to separate, if the unbeliever separate or "depart," in the latter nothing but "fornication" justifies separation [PHOTIUS in Æcumenius]. but God hath called us to peace--Our Christian calling is one that tends to "peace" (Rom 12:18), not quarrelling; therefore the believer should not ordinarily depart from the unbelieving consort (Co1 7:12-14), on the one hand; and on the other, in the exceptional case of the unbeliever desiring to depart, the believer is not bound to force the other party to stay in a state of continual discord (Mat 5:32). Better still it would be not to enter into such unequal alliances at all (Co1 7:40; Co2 6:14).

In this chapter the apostle answers some cases proposed to him by the Corinthians about marriage. He, I. Shows them that marriage was appointed as a remedy against fornication, and therefore that persons had better marry than burn (Co1 7:1-9). II. He gives direction to those who are married to continue together, though they might have an unbelieving relative, unless the unbeliever would part, in which case a Christian would not be in bondage (Co1 7:10-16). III. He shows them that becoming Christians does not change their external state; and therefore advises every one to continue, in the general, in that state in which he was called (Co1 7:17-24). IV. He advises them, by reason of the present distress, to keep themselves unmarried; hints the shortness of time, and how they should improve it, so as to grow dead and indifferent to the comforts of the world; and shows them how worldly cares hinder their devotions, and distract them in the service of God (Co1 7:25-35). V. He directs them in the disposal of their virgins (Co1 7:36-38). VI. And closes the chapter with advice to widows how to dispose of themselves in that state (Co1 7:39, Co1 7:40).

7:15 If the unbeliever breaks up the marriage, the believing husband or wife is free to let them go. • has called you: God’s desire is that his people live in peace, rather than in the intolerable conflict of a mixed marriage no longer desired by the non-Christian spouse.