How do we know the doctrine of marriage is true?

The truth of the doctrine of marriage is rooted in biblical scripture and the testimony of creation. In Genesis 2:18-24, God initiates the first marriage, illustrating His divine design for relationships between a man and a woman. Jesus also affirms this teaching in Matthew 19, citing Genesis as the foundation for His understanding of marriage. Additionally, the comparison between Christ and the Church in Ephesians 5 further reinforces that marriage is not merely a social contract but a sacred covenant that reflects the relationship between Christ and His people. Therefore, the biblical doctrine of marriage transcends cultural understanding and is anchored in God's eternal purpose.