How do we know God's purpose for marriage is true?

The truth of God's purpose for marriage is rooted in the biblical narrative that outlines its origin and design. In Genesis 2, God states that it is not good for man to be alone, indicating His intentional creation of a companion suitable for Adam. This divine purpose is echoed in Ephesians 5, where the Apostle Paul compares the marital relationship to that of Christ and His Church. Hence, the consistent theme throughout Scripture underscoring marriage as a sacred union indicates that this purpose is an essential part of God's eternal design. This assurance from the Word of God provides believers with the confidence that the institution of marriage is aligned with God's character and intentions.