From a CT interview in 1995 by Michael Cromartie:
Certain things which the market authorizes simply in terms of law are unchristian and ought not to be done. The big issue today has to do with the fidelity of marriages. The tendency now to leave your wife because you have an infatuation with a younger woman of tenderer flesh is an enormous temptation. It’s carnal, and it’s also easy to justify with all the solipsistic reasoning that we hear today. That is about the gravest offense that a human being can commit, to throw away a wife.
From this it doesn’t follow that the state should make the law tougher, but rather that the culture needs to be reformed. Modifying the law is only one way, and often not the best, to do that: “…unless we create a virtuous society, it’s not a society that’s going to endure. So the right things should be encouraged and the wrong things discouraged. Today, roughly speaking, there is zero taboo against fornication.”
The whole thing is worth reading, as they say (HT).