Galatians 4:4-9 (ESV, emphasis added):
But when the fullness of time had come, God sent forth his Son, born of woman, born under the law, to redeem those who were under the law, so that we might receive adoption as sons. And because you are sons, God has sent the Spirit of his Son into our hearts, crying, "Abba! Father!" So you are no longer a slave, but a son, and if a son, then an heir through God. Formerly, when you did not know God, you were enslaved to those that by nature are not gods. But now that you have come to know God, or rather to be known by God, how can you turn back again to the weak and worthless elementary principles of the world, whose slaves you want to be once more?Think about the flow of thought:
Redeemed from the orphanage - the house of slavery for all us rebel runaways.
Adopted by the Father.
No longer slaves.
Sons and daughters!
Remember, when you didn't know God as your Father, you were enslaved.
Now that you have come to know God as your Father...
Wait, more importantly (and decisively), now that you have come to be known by God the Father, why would you turn from Love to head back to the house of slavery?
1 John 3:1a (ESV):
See what kind of love the Father has given to us, that we should be called children of God; and so we are.We adopted children need to stop listening to the old voices in our heads and look up to see the loving smile of our Father.
Is it possible?
So we are.