In Samuel 15: 22b there is a phrase that rings in my mind from time to time.  "...to obey is better than sacrifice…"  I can hear the music in my head and the song in my mind.  Was it Keith Green who recorded it?  I love that song.

God had told Samuel to anoint Saul as king.  Samuel had done this, but Saul disobeyed God and in Samuel 15: 11 God says, "…It repents me that I have set up Saul to be king: for he is turned back from following me, and has not performed my commandments.

Obedience.  Such a simple concept.  Obey God.  Adhere to His commandments.  Follow His rules.  Why are we so headstrong in the face of a Supreme Creator?