Now I say, That the heir, as long as he is a child, differeth nothing from a servant, though he be lord of all; but is under tutors and governors until the time appointed of the father.  Even so we, when we were children, were in bondage under the elements of the world: but when the fulness of the time was come, God sent forth His Son, made of a woman, made under the law, to redeem them that were under the law, that we might receive the adoption of sons.  And because ye are sons, God hath sent forth the Spirit of His Son into your hearts, crying, “Abba, Father.”
Galatians 4:1-6