Galatians 4:1-7 (ESV)

4 I mean that the heir, as long as he is a child, is no different from a slave, though he is the owner of everything, ² but he is under guardians and managers until the date set by his father. ³ In the same way we also, when we were children, were enslaved to the elementary principles of the world. ⁴ But when the fullness of time had come, God sent forth his Son, born of woman, born under the law, ⁵ to redeem those who were under the law, so that we might receive adoption as sons.⁶ And because you are sons, God has sent the Spirit of his Son into our hearts, crying, “Abba! Father!” ⁷ So you are no longer a slave, but a son, and if a son, then an heir through God.