Peter M. Kalellis is a psychotherapist, marriage and family therapist, lecturer, retreat director, and writer. He has a doctorate in clinical psychology and is the author of several books including Five Steps to Spiritual Growth (2005), Letting Go of Baggage (2007), God's Power within You (2010), Living in Difficult Relationships (2012) and The Face of Jesus (2013), all published by Paulist Press.