I wouldn't tell them. The books/this site were not designed for that. I would try to get them to read books like The Truth About Love, The Five Languages of Love, etc. I think that would be much more productive.
Those books on love are productive at a certain level.
If your spouse is involved with any addiction, or dealing with emotional abuse of any level, those books won't help you.
Sorry but I find there's way too much chat about love as a tool to resolve marriages at risk here and not enough about protecting yourself from abuse...
There IS a limit... And I don't hear that discussed nearly enough...