The Biblical Theory of Christian Education

Now ever since the fall of man all people and all children, even Christian people and Christian children (that is, children born of Christian parents), are conceived in sin. They are “shapen in iniquity,” even before their birthd.(20)   Indeed, they cannot see the Kingdom of God — unless they are born again from above.(21)

This applies even to infants from Christian homes.   However, these Christian children -unlike Non-Christian children — are sanctified from birth [and indeed even from conception(22)], on account of their being conceived and born inside the Covenant (23).