Psalm 51 vs 10-13 is hinged on the need to stay on the cutting-edge of what God is doing and saying today. How do we conduct ourselves even as the called-out ones of God. We have been called out from the world- and, we must do all we can to stay away from the world(system). God has called out for himself- we are the Lords portion- celebrate that truth and walk in it. Halleluyah!