Body of Christ branches cause-and-effect chaos church churches church planting city complexity conscious conversion doing the Bible doug hall eagle empowerment eye salve fallen world forgiveness Forrester fruit Fruit of the Spirit grafting immune system implant Living System Questions Living Systems multiple causes Normal State of Being organization Organizational order perception threshold primary and secondary primary culture Process of the Gospel Quiet Revival redemption redemptive method remain repentance revitalization safe environment salvation secondary culture setting truth free signs social revelation social system doctor subconscious subsystem symptoms system systems thinking total redemption transformation truth unintended negative returns video vine Works Mental Model works method