Galatians 4:7-10

Now you are no longer a slave but God’s own child. And since you are his child, God has made you his heir. Before you Gentiles knew God, you were slaves to so-called gods that do not even exist. So now that you know God (or should I say, now that God knows you), why do you want to go back again and become slaves once more to the weak and useless spiritual principles of this world? You are trying to earn favor with God by observing certain days or months or seasons or years.