The Philosophical principles of a relationally focused Integrative Psychotherapy are described through the concepts of vulnerability, authenticity, and inter-subjective contact. Eight principles or therapist attitudes are outlined with clinical examples that illustrate the philosophy. These philosophical principles provide the foundation for a theory of methods. This article is based on a keynote address given at the 6th International Integrative Psychotherapy Association Conference, Grantham, UK, July 11-14, 2013.