What is the test? Going back to the Greek, the actual command ("be filled with the Spirit" and be ruled by Christ) is found several verses back, making submission to one another the natural product of revering Him as the center. Although we apply this to all relationships, today we focus on husbands and wives.
What is the big picture? Marriage parallels Christ's agape for the Church. Husbands are to serve, care for, and die for their wives. Wives, in response, are to love, serve, and obey their husbands.
How are we to "be holy" (Leviticus 19:2)? We are to be set apart for service; only our God came to serve, compared with other "gods," who are only served. Love is shown most directly by acts of service. Husbands especially, make sacrifices of your attitude for the team's sake ("us" vs. "me"). The extent? "JUST AS CHRIST." Wives, submit AS TO CHRIST in everything. Yield and fear not, for your husband loves you per above. Don't follow the worldly habit of saying your nastiest words to your husband. Pray to serve without resentment - what a privilege!
Soli Deo gloria.