When you didn't know God, you were slaves to things which are really not gods at all.
But now you know God, or rather, God knows you. So how can you turn back again to the powerless and bankrupt principles of this world? Why do you want to become their slaves all over again?
You religiously observe days, months, seasons, and years!
I'm afraid for you. Maybe the hard work I spent on you has been wasted.