In 1996 Dallas Willard was asked to be the general editor for a new series of spiritual formation books through NavPress. Dallas and some of the possible authors gathered at The Navigators' Glen Eyrie Conference Center to talk through the main issues and hear from Dallas on his vision for the topic. These three messages were the raw material for what became Renovation of the Heart. This group went on to become the Theological and Cultural Thinkers (TACT) and continued to meet for ten years.