In his message “Heart Over Sacrifice”, Chatman  illustrates from the story of Jonah, the importance of having a right heart in our service for God. Jonah was serving God, but had a  hard heart, a symptom of spiritual immaturity. God wants our heart before anything else. God has mercy on us even in our immaturity, but  left unchecked, spiritual immaturity will keep us removed from his greatest blessings.