Because you are sons, God has sent forth the Spirit of His Son into our hearts, crying, "Abba! Father!"
Therefore you are no longer a slave, but a son; and if a son, then an heir through God.
However at that time, when you did not know God, you were slaves to those which by nature are no gods.
But now that you have come to know God, or rather to be known by God, how is it that you turn back again to the weak and worthless elemental things, to which you desire to be enslaved all over again?