If you love someone, of course you care for them, and not for nothing did the original marriage vow contain those meaningful words "in sickness and in health".
So "submit" in a marriage could mean persevering during difficult times, often against all odds, and taking the lifelong marriage vow seriously like my parents did.
His common practice when sought out for divorce cases was to counsel couples to remain together, work out their problems and honor their marriage vows.