Let's look at a few Bible passages here, because I want to make sure the point I am going to make is clear:
Matt. 19:8 -- "Moses permitted you to divorce your wives because our hearts were hard."
Ephesians 4:17-19 -- "So I tel you this, and insist on it in the Lord, that you must no longer live as the Gentiles do, in the futility of their thinking. They are darkened in their understanding and separated from the life of God because of the ignorance that is in them due to the hardening of their hearts. Having lost all sensitivity, they have given themselves over to sensuality, so as to indulge in every kind of impurity, with a continual lust for more."
Speaking of Israel, God says through Ezekiel in Ez. 11:19-20, "I will give them an undivided heart and put a new spirit in them; I will remove from them their heart of stone and give them a heart of flesh. Then they will follow my decrees and be careful to keep my laws. They will be my people and I will be their God."
In Romans, Paul says of the Jew, "...a man is a Jew if he is one inwardly; and circumcision is circumcision of the heart, by the Spirit, not by the written code."
Earlier, in Romans 1:21, Paul is saying of the people who deliberately suppress the truth they are confronted with, "For although they knew God, they neither glorified him as God nor gave thanks to him, but their thinking became futile and their foolish hearts were darkened." And then, again, in verse 28, "Furthermore, since they did not think it worthwhile to retain the knowledge of God, he gave them over to a depraved mind, to do what ought not to be done."
Amy Grant knew who God was. I have several tapes of her first recordings and, in fact, this morning have been humming her song, "What A Difference" [You've Made in My Life]. So many of her first songs clearly showed the lady knew WHO God was.
But this is not the same as knowing God. God circumcises the heart, as Paul mentioned regarding the Jews. God strips off the hardness we ourselves have produced.
Which is my way of saying that a "Christian divorce" is an impossibility. There is no such thing. The very first fruit of the Spirit is love -- not just an emotion, but the ability to care for another and commit to another above and beyond the point of discomfort for self. It involves concentration on the beloved, not on self.
The FIRST fruit of the Spirit!
Can that born again heart then harden again? No, because that person is indwelt by the Holy Spirit and God IS faithful to complete the good work He began.
Now, that being said, I am a divorced woman. My husband of 20 years had made a profession of faith, been baptised, was head usher in a fairly large church (for this area, anyway!).
At the same time, he had been carrying on with other women most of the time we were married.
He left in 1991 with another woman. Her husband had been an elder in another church and had left her. My ex filed for divorce and effectively abandon me and our six children -- he did not pay any attention to most of them after the first year he had gone. The attention he paid to the two he did notice was cursory and painful for them both. His heart was totally hardened toward them -- which is incredible because five of our children are adopted special case kids.
Was/is this man a Christian? His heart is hard. But he got baptised AGAIN after he left us. Declared that he had not really been a Christian before but now he really was.
No change in his caring for his children, however. That was not there. Nor would he send child support until ordered by a judge.
So was ours a Christian divorce? No. It was as pagan as they come, except that I, as a Christian, was caught in it. But we are told to allow the unbeliever to leave. I have to admit, though, it wasn't until the past few years that I was finally, totally, able to release him way deep in my heart! One does not commit and then let go lightly!
But TWO Christians in a marriage? They have hearts softened by the Lord, capable of loving and being loved. Their hearts desire the Lord first and He Himself gives them a love and understanding of one another that transcends whether or not the cap is on the toothpaste tube or the car ran out of gas or the woman in the restaurant is pretty and flirts. God causes deep, deep caring past the daily irritations, money problems, kid problems, in-law problems, boss problems, -- you name it.
I did not realize the difference until I was married two years ago to a man who loves God first and centers his life around that love. What a difference in a marriage! We're not perfect and I get grouchy, but this is a marriage with God in it and, as such, the very concept of divorce is utterly foreign to it.
So here is my point, again: there is no such thing as a Christian divorce. Those who attend church who do get divorced are declaring that at least one of them is not a Christ follower.
A Christian married to a non-believer (regardless of profession of faith) often gets caught in a divorce. Two non-believers can divorce. But two believers? Impossible. God has changed their hearts and their marriage is a reflection of that.