How can a wife help her husband if he doesn’t know Jesus as Savior and Lord?

1 Corinthians 7:13-16If a believing woman has a husband who is not a believer and he is willing to continue living with her, she must not leave him. For the believing wife brings holiness to her marriage, and the believing husband brings holiness to his marriage. Otherwise, your children would not be holy, but now they are holy. (But if the husband or wife who isn’t a believer insists on leaving, let them go. In such cases the believing husband or wife is no longer bound to the other, for God has called you to live in peace.) Don’t you wives realize that your husbands might be saved because of you? And don’t you husbands realize that your wives might be saved because of you?

1 Peter 3:1In the same way, you wives must accept the authority of your husbands. Then, even if some refuse to obey the Good News, your godly lives will speak to them without any words. They will be won over.

Displaying love and godliness is the best way to witness to an unbelieving spouse. In time, this may bring him or her to Christ.