Franklin College in Franklin, Indiana, has been David's home for the past forty-three years. David has been particularly attracted to the topics of faith development, Catholic-Orthodox relations, and Christian-Muslim dialogue. In 2007, he conducted interviews across the country in monasteries and convents about monastic responses to 9/11. The book based on that experience, Peace Be with You: Monastic Wisdom for a Terror-Filled World, was chosen as one of the Best Books of 2011 by Library Journal.