Biblical Answer

In the biblical context, "one flesh" refers to the personal union of a man and woman at all levels of their lives. This understanding is rooted in the scriptural definition of marriage, where a man and his wife become "one flesh" as they are joined together in a covenant relationship (Genesis 2:24). This union is not just physical, but also spiritual and emotional, where the two become one in the unity of their substance.

This concept of "one flesh" is echoed in various Christian traditions, including the writings of Augustine, who understood it to mean oneness in body. The Bible also uses the phrase "one flesh" to illustrate spiritual union, where Christians are united with God through their faith in Jesus Christ (Ephesians 5:28-32). This union is so profound that it is compared to the relationship between Christ and the church.

In practical terms, the phrase "one flesh" points to the significance of sexual intimacy in marriage, where it is understood as a sign of the personal and legal union between a man and woman. Paul warns against being joined to a prostitute, as it would mean being joined to someone physically without being united at a deeper level (1 Corinthians 6:16). Therefore, the phrase "one flesh" highlights the importance of a committed and covenantal relationship in marriage, where two people become one in body, spirit, and soul.