ISB ~ John 1 v13

not of blood … flesh … man:Three means or processes that bring about natural birth into the world, i.e., women, the sexual impulse, and men. John is stressing that natural birth does not establish us in a supernatural relationship with God.

• A similar cluster of ideas is found in Wis 7:1-2, where human existence is said to depend on the blood of prenatal gestation, the pleasure of marital relations, and the seed of man.