A Hard Doctrine?

A Hard Doctrine? I think the issue of divorce and remarriage is a hard one. I believe that, yes, divorce should happen only because of marital unfaithfulness, but the "no remarriage" part I have a hard time with. After reading the article, I think I agree with what is written. But it is not easy for me, because I know a few happily remarried couples, and it is difficult for me to believe that their relationship is wrong. And yet, with the divorce rate so high, something is definitely wrong...