What is Paul saying in Ephesians 5 about mutual submission and how does it apply to marriage for husbands and wives?

As the culture descends further into post-Christianity, many of us are probably finding ourselves in a circumstance where we’re being invited to attend same-sex weddings, the ordination of persons who are not biblically qualified for office, a cultic/pagan/non-Christian ritual, or some other event that is equally problematic. How should we respond?