I Corinthians 7:16

What knowest thou but that by staying with thy unbelieving partner thou mayest save him or her? Enforcing the precept to stay with the unbelieving consort (Co1 7:12-14). So Ruth the Moabitess became a convert to her husband's faith: and Joseph and Moses probably gained over their wives. So conversely the unbelieving husband may be won by the believing wife (Pe1 3:1) [CALVIN]. Or else (Co1 7:15), if thy unbelieving consort wishes to depart, let him go, so that thou mayest live "in peace": for thou canst not be sure of converting him, so as to make it obligatory on thee at all costs to stay with him against his will [MENOCHIUS and ALFORD]. save--be the instrument of salvation to (Jam 5:20).

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).

7:16 There is always the hope that the believing spouse will win the unbelieving mate to faith in Christ. However, the Greek text is ambiguous and could also be interpreted as saying that there is no guarantee that the believing mate will ever win over the unbelieving spouse.