How can I leave when I’m the only one who is giving a gospel witness to him?
How do you know, wife, whether you will save your husband? Or how do you know, husband, whether you will save your wife? (1 Cor 7:16)
This verse has been used to lay guilt on victims of abuse, to get them stay in the marriage in the hope that their abusers will be converted.
You cannot know whether or not your husband will come to Christ because of your gospel witness. You don’t know whether your spouse will ever be converted. Salvation is a gift from God and it only happens when He quickens a dead spirit to life. The author of salvation is God, not us.
The question “How do you know whether you will save your husband?” can embrace both optimism and pessimism. John MacArthur (who we rarely quote approvingly) actually has a wise word about this verse. He calls it God’s caution against marital evangelism.
Barbara’s book Not Under Bondage [*affiliate link] deals with this on page 44.
Posts on this blog you may find helpful
What does Scripture Really Say? — ACFJ Resource page