Chapter 6 presents marriage as more than companionship. It is a qualification for heavenly citizenship because it joins a man and woman to God’s love and places them under a vocation larger than themselves.
That is why the chapter resists possessive language. The spouse is not simply “mine,” but God’s son or daughter and humanity’s representative. Marriage becomes public before it becomes private.
This makes true marriage a kind of civic training for the Kingdom of Heaven. It asks whether a couple can love in a way that resembles God, serves humankind, and prepares a household fit for heaven.