Ephesians 5:22–33 is an important passage in debates on headship and submission in marriage. An important aspect of this passage that has not received the attention it deserves, however, is the reference to a “great mystery” (Ephesians 5:32). The term "mystery" occurs consistently throughout Ephesians. An understanding of Paul’s use of the term can help in the understanding of marriage according to Ephesians 5:22–33.