For decades, Dr. Cloud and Dr. Townsend have helped people learn how the mind works, and how our spiritual health affects our mental health. They collaborated to write the groundbreaking book Boundaries, which has helped millions of readers learn what scripture has to say about loving others but setting personal limits, and the scientific research that backs up these biblical principles. Dr. Townsend has also explored cutting-edge research on relational nutrients, which he wrote about in his new book “People Fuel.”