We live in a world of mystery, wonder and beauty. But most of us seldom participate in this real world, being focused rather on the part that is mostly strife, suffering or meaninglessness. This situation is basically due to our not realizing and living our full human potential. This potential can be actualized by the realization and development of the human Essence. The human Essence is the part of us that is innate and real, and can participate in the real world. This series of books, Diamond Heart, is a transcription of talks I have given to inner work groups in both California and Colorado, for several years, as part of the work of these groups. The purpose of. the talks is to guide and orient individuals who are engaged in doing the difficult work of essential realization.