 Thanissaro Bhikkhu traces the roots of modern spiritual ideals from German Romantic Era philosopher Immanuel Kant through American psychologist and philosopher William James, Jung and humanistic psychologist Abraham Maslow.Thanissaro sees their view as centered on the idea of healing the 'divided self', an idea which is alien to Buddhism.Thanissaro asserts that there are also core differences between Romantic/humanistic psychology and Buddhism.