7:10-16 Man and wife must not separate for any other cause than what Christ allows. Divorce, at that time, was very common among both Jews and Gentiles, on very slight pretexts. Marriage is a Divine institution; and is an engagement for life, by God's appointment. We are bound, as much as in us lies, to live peaceably with all men, Ro 12:18, therefore to promote the peace and comfort of our nearest relatives, though unbelievers. It should be the labour and study of those who are married, to make each other as easy and happy as possible. Should a Christian desert a husband or wife, when there is opportunity to give the greatest proof of love? Stay, and labour heartily for the conversion of thy relative. In every state and relation the Lord has called us to peace; and every thing should be done to promote harmony, as far as truth and holiness will permit.
10. not I, but the Lord—(Compare 1Co 7:12, 25, 40). In ordinary cases he writes on inspired apostolic authority (1Co 14:37); but here on the direct authority of the Lord Himself (Mr 10:11, 12). In both cases alike the things written are inspired by the Spirit of God "but not all for all time, nor all on the primary truths of the faith" [Alford].
Let not the wife depart—literally, "be separated from." Probably the separation on either side, whether owing to the husband or to the wife, is forbidden.