 But then he was sent on a job by God, and he just thought he knew better, and he didn't do it. And finally he says, Samuel does, For rebellion is as the sin of witchcraft, and stubbornness is as iniquity and idolatry, because you have rejected the word of the Lord. What he did, he put his own opinion ahead of what God told him to do. He said, The Lord has also rejected you from being king. And poor Saul ended up a pitiful creature.