Paul is saying not only answers the objection that marriage is oppressive and restrictive, but it also addresses the sense that the demands of marriage are overwhelming. There is so much to do that we don’t know where to start. Start here, Paul says. Do for your spouse what God did for you in Jesus, and the rest will follow. This is the secret—that the gospel of Jesus and marriage explain one another. That when God invented marriage, he already had the saving work of Jesus in mind.