I’ve read and re-read the passage about being unequally yoked and it doesn’t seem to be referring to marriage at all. It says:
Don’t become unequally yolked together with unbelievers; For what partnerships have justification and lawlessness? Or what fellowships radiance and moral darkness? What agreement is there between Christ and Belail [a demon]? Or what part to a believer with an unbeliever? What agreement has the temple of God [the part of the temple in Jerusalem where God literally resides] with false gods?
For we are an assembly of the living God, as has said God: I will walk in the midst of you, and my dwelling place with be with you [in the temple], and you will be to me as people, and I will be to you as God. - 2 Corinthians 6
In the last verse above, Paul is quoting:
- 1 Corinthians 3:16: [Himself]: Do you not know that you are God’s temple and that God’s Spirit dwells in you?
- Leviticus 26:12: And I will walk among you, and will be Elohim to you, and ye shall be My people.
- Ezekiel 37:27: My dwelling place also shall be with them; yes, I will be their Elohim, and they shall be My people.
- Jeremiah 32:38: And they shall be My people, and I will be their Elohim.
This passage seems to refer to partnerships in general, which marriage could be included in, but marriage is never mentioned. It seems general partnerships would include things like a for profit business, or a charity. Or an employer. Most of us ignore this completely in modern society. We have no problem with the idea of working with or for non-believers.
One thing Paul did write about marriage, which appears to be diametrically opposed to the idea that being married to a non-believer is wrong/an issue, is…
To the rest I say—I and not the Lord—that if any believer has a wife who is an unbeliever, and she consents to live with him, he should not divorce her. And if any woman has a husband who is an unbeliever, and he consents to live with her, she should not divorce him. For the unbelieving husband is made holy/is sanctified through his wife, and the unbelieving wife is made holy/is sanctified through her husband. Otherwise, your children would be unclean, but as it is, they are holy. But if the unbelieving partner separates, let it be so; in such a case the brother or sister is not bound. It is to peace that God has called you. Wife, for all you know, you will bring the salvation of our god to your husband. Husband, for all you know, you will bring the salvation of our god to your wife. - 1 Corinthians 7
So, the believing spouse makes the non-believing spouse holy, and can bring them salvation?! That’s interesting! I’ve never heard that one preached from the pulpit.