From the website that I posted earlier.
- Jesus is Presenting a Radical Teaching
For those who claim that Jesus is creating an exception for adultery (or for sexual infidelity or immorality), consider the Biblical context. The Pharisees asked, “Is it lawful to divorce one’s wife for any cause?” (Mt. 19:3).
This question arose out of a dispute between two Jewish schools. Deuteronomy 24:1 permitted a man to divorce his wife if “he has found some indecency in her.” Was this indecency referring to adultery, or any fault? The great rabbi Hillel the Elder had claimed that it permitted divorce for any indecency, opening the door to divorces over completely trivial matters. More conservative rabbis claimed that the indecency in question was adultery. So those were the two camps (and basically, the Protestant positions today).
**If Jesus was saying that there’s an exception for divorce, all He had to do is say that the conservative camp was right. **But He doesn’t. Jesus rejects both camps, saying (Mt. 19:4-9):
“Have you not read that he who made them from the beginning made them male and female, and said, ‘For this reason a man shall leave his father and mother and be joined to his wife, and the two shall become one’? So they are no longer two but one. What therefore God has joined together, let not man put asunder.”
Code:
They said to him, “Why then did Moses command one to give a certificate of divorce, and to put her away?” He said to them, “For your hardness of heart Moses allowed you to divorce your wives, but from the beginning it was not so. And I say to you: whoever divorces his wife, except for unchastity, and marries another, commits adultery; and he who marries a divorced woman, commits adultery.”
So Jesus calls us back to the indissolubility of marriage, the Pharisees invoke Deuteronomy 24:1,** and Jesus revokes the adultery exception to restore marriage to its state prior to the Law.
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This teaching is so radical that His shocked Apostles say “If such is the case of a man with his wife, it is not expedient to marry” (Mt. 19:10). And Jesus doesn’t disagree, instead using the opportunity to call those who can handle it to the ideal of celibacy (Mt. 19:11-12).
The reaction of the Apostles makes no sense if Jesus is just saying that the pre-Hillel Jewish divorce laws apply. Nor does Jesus’ repudiation of the Mosaic exception.
- The “Infidelity Exception” is Contrary to Scripture
Whether you argue that Matthew’s Gospel contains an exception allowing divorce and remarriage in the case of adultery, infidelity, or any other instance, you’re going to run into a huge Gospel harmonization problem. Here’s what Luke 16:18 says on marriage:
Every one who divorces his wife and marries another commits adultery, and he who marries a woman divorced from her husband commits adultery.
That’s it. There’s nothing before or after this verse to mitigate its punch: it’s an absolute prohibition against divorce and remarriage. We see this absolute prohibition in Mark 10:11-12 as well.
To hold to the adultery exception is to hold that Jesus taught one thing (divorce and remarriage is okay in some cases) to the Jewish readers of Matthew’s Gospel, while teaching a contradictory thing (divorce and remarriage is never okay) to the Gentile readers of Mark’s Gospel. No faithful Christian can hold to such an incoherent position, since it amounts to claiming that either Matthew or Mark and Luke are presenting a false teaching.
Even leaving aside the impossibility of harmonizing the “infidelity exception” with Mark and Luke’s Gospel, how can one harmonize it with the rest of Matthew’s own Gospel? In Matthew 19:6, right before the verse in question, Jesus says that the spouses “are no longer two but one. What therefore God has joined together, let not man put asunder.”**