What is the significance of being 'one flesh' in marriage?

The concept of 'one flesh' in Genesis 2:24 illustrates the idea of unity in marriage, which serves as an earthly illustration of the spiritual union between Christ and his church. This unity goes beyond physical togetherness; it implies a profound emotional, spiritual, and relational bond. In Ephesians 5:30-32, Paul references this unity to emphasize that just as husband and wife are meant to support and love one another, Christ cherishes and cares for His church. Understanding this helps believers appreciate the depth of their commitment in marriage and the expectations it carries.