12 if any brother has a wife who is an unbeliever, and she consents to live with him, he must not divorce her.
13 And a woman who has an unbelieving husband, and he consents to live with her, she must not send her husband away.
14 For the unbelieving husband is sanctified through his wife, and the unbelieving wife is sanctified through her believing husband; for otherwise your children are unclean, but now they are holy.
1 Corinthians 7:12-14  NASB


No, they are unclean.
14 Do not be bound together with unbelievers; for what partnership have righteousness and lawlessness, or what fellowship has light with darkness?
15 Or what harmony has Christ with ]Belial, or what has a believer in common with an unbeliever?
16 … 17 “Therefore, come out from their midst and be separate,” says the Lord. “And do not touch what is unclean; And I will welcome you.”
2 Corinthians 6:14-17  NASB


SAB Contradiction 461


The state of marriage in the Bible seems to pose a difficulty for many people. Sadly enough many people have lost their compass (their heart). Let’s look at the problem for the critic.


The Yes-statement
Very wrong. This (1 Corinthians 7:12-14 ) is said about a couple already married before they heard the Gospel. So the question “Is it OK to marry an unbeliever?” is absolutely not to the point, as they are already married. The Gospel does not encourage couples to divorce but to remain together in the calling in which they were before the Gospel came.

A marriage before the Gospel came, was seen as a calling of God “Each man/woman must remain in that condition in which he was called.” (1 Corinthians 7:20) It was seen as natural in a good relationship that the spouse, seeing the blessing of the faith would also embrace the Gospel and believe. (1 Peter 3:1-20)


The No-statement
Right. It was/is a rule in Christianity not to marry an unbeliever. In these circumstances, where one person does not share faith in the Gospel there is no common ground for the marriage. 
Marrying an unbelieving woman or man does not give the assurance that she/he will at some point come to believe; on the contrary if one rejects the faith of a partner before marrying, there is little chance that this will change after marrying.

In the first instance there is already a marriage, while in the second there is not. That’s the difference and it is not justifiable to compare the two situations and conclude there is a contradiction.            


No Bible Contradiction


Compare SAB Contradiction 376: Is it OK for a divorced woman to remarry?