How does marriage illustrate the Gospel?

In Ephesians 5:25-27, the Apostle Paul compares the husband's role to Christ's, stating that husbands should love their wives as Christ loved the Church. This sacrificial love illustrates the Gospel in that just as Christ gave Himself for the Church, husbands are called to selflessly serve and protect their wives. Conversely, wives are instructed to respect and submit to their husbands, reflecting the Church's submission to Christ. The marriage relationship, therefore, serves as a living testament to the Gospel, portraying the dynamics of love, sacrifice, and unity that are central to Christian faith.