Genesis 2:24
King James Version
“Therefore shall a man leave his father and his mother, and shall cleave unto his wife: and they shall be one flesh.”
New International Version
“That is why a man leaves his father and mother and is united to his wife, and they become one flesh.”
Commentary
This verse is the foundation of biblical marriage — the original definition given by God in the garden before sin entered the world. Jesus quotes it in Matthew 19:5, and Paul quotes it in Ephesians 5:31, establishing that it carries the full weight of divine authority across both Testaments. Three movements define the covenant: leaving (a decisive break from prior primary allegiances), uniting (a deliberate attachment — the Hebrew word used is the same word used for God "cleaving" to his people), and becoming one flesh (a union that is at once physical, emotional, and covenantal). "One flesh" does not erase individuality but creates a new entity — a union that is, in biblical terms, not separable without violence. The simplicity of this verse belies its profundity: marriage is designed to be permanent, primary, and comprehensive.