The sermon establishes marriage as a divine institution designed by God, rooted in the creation of male and female in Genesis and affirmed by Jesus in Matthew. It contrasts biblical definitions with worldly perspectives, emphasizing that marriage is a permanent union intended to last until death, not a conditional contract based on feelings. The speaker highlights the radical shift in priorities required when leaving parents to cleave to one's spouse, making the husband-wife relationship the primary human bond while keeping God supreme. Furthermore, the sermon explains that earthly marriage serves as an allegory for the relationship between Christ and the Church, calling husbands to sacrificial love and wives to respectful submission. Ultimately, the message urges believers to uphold this sacred design, recognizing it as a profound mystery that reflects spiritual truths.