1 Corinthians 7:16
For what knowest thou, O wife, whether thou shalt save thy husband? or how knowest thou, O man, whether thou shalt save thy wife? (1 Corinthians 7:16)
Save.
The reason why the believing party to a marriage should not leave the other, or desire to be separated from the unbeliever, is that the non-Christian might be led to accept Christ as his Saviour by the example and influence of the believer. The conversion of the unbeliever would bring great happiness and blessing to the family as a whole and to the unbeliever in particular. This object is so important that the Christian should be willing to be patient and long-suffering in order to bring it about. He should never cease for one moment to live a true Christian life, no matter what provocation may arise to prompt him to do otherwise. There should be continual communion with God in prayer that the unbelieving companion may be won from unbelief to a life of peaceful, harmonious and happy preparation for the heavenly home.