In today's Gospel reading from Luke 16, Jesus said to the Pharisees, "You justify yourselves in the sight of others, but God knows your hearts; for what is of human esteem is an abomination in the sight of God." The fact that God knows our hearts shows that he is God and our creator. "Abomination" is a severe word. Here, regarding yourself to be more important than God is an abomination to God. Think of it, it's pretty much spiritual common sense. Obviously, remaining humble before the Lord will be most pleasing to him.