Chapter 24 covers Reformed teaching on marriage and divorce. Marriage is to be heterosexual and monogamous. The purpose of marriage is to provide for the mutual help of husband and wife, the birth of legitimate children, the growth of the church, and the prevention of "uncleanness." The confession discourages interfaith marriage with non-Christians, Roman Catholics, or "other idolaters". In addition, godly persons should not be "unequally yoked" in marriage to "notoriously wicked" persons. Incestuous marriage, defined according to biblical guidelines, is also prohibited. The only grounds for divorce are adultery and willful abandonment by a spouse.