Here's part of what I quoted (emphasis added), but I'd encourage you go and read the whole thing:
Over the course of our ministry, the most common pastoral issue that Tim and I have confronted is probably marriages—either actual or proposed—between Christians and non-Christians. I have often thought how much simpler it would be if I could remove myself from the conversation and invite those already married to unbelievers do the talking to singles who are desperately trying to find a loophole that would allow them to marry someone who does not share their faith.
Despite the fact that the Bible is clear on the matter (e.g. 1 Cor 7:39 and 2 Cor 6:14),
…variants of the serpent's question to Eve—“Did God really say?” are floated, as if somehow this case might be eligible for an exemption, considering how much they love each other, how the unbeliever supports and understands the Christian's faith, how they are soul-mates despite the absence of a shared soul-faith. …
There are only three ways an unequal marriage can turn out … :
- In order to be more in sync with your spouse, the Christian will have to push Christ to the margins of his or her life. This may not involve actually repudiating the faith, but in matters such as devotional life, hospitality to believers (small group meetings, emergency hosting of people in need), missionary support, tithing, raising children in the faith, fellowship with other believers—those things will have to be minimized or avoided in order to preserve peace in the home.
- Alternatively, if the believer in the marriage holds on to a robust Christian life and practice, the non-believing PARTNER will have to be marginalized. If he or she can't understand the point of Bible study and prayer, or missions trips, or hospitality, then he or she can't or won't participate alongside the believing spouse in those activities. The deep unity and oneness of a marriage cannot flourish when one partner cannot fully participate in the other person's most important commitments.
- So either the marriage experiences stress and breaks up; or it experiences stress and stays together, achieving some kind of truce that involves one spouse or the other capitulating in some areas, but which leaves both parties feeling lonely and unhappy.
Does this sound like the kind of marriage you want? One that strangles your growth in Christ or strangles your growth as a couple, or does both? Think back to that off-cited passage in 2 Corinthians 6:14 about being “unequally yoked.” Most of us no longer live in an agrarian culture, but try to visualize what would happen if a farmer yoked together, say, an ox and a donkey. The heavy wooden yoke, designed to harness the strength of the team, would be askew, as the animals are of different heights, weights, walk at different speeds and with different gaits. The yoke, instead of harnessing the power of the team to complete the task, would rub and chafe BOTH animals, since the load would be distributed unequally. An unequal marriage is not just unwise for the Christian, it is also unfair to the non-Christian, and will end up being a trial for them both.