In this book, we find as a focus of the question of the interrelationship as a major duty, found in the meaning of the word reciprocity, which , is presented in a colloquial expression that means “ helping one another” Our mission is essential and surmounted in love and compassion within an unrestricted human solidarity. My experience as a psychotherapist has always been very rewarding to support the author of this book, as wife and companion, to share the guidelines of each assessment and training to be given in our care to those who were seeking our help, encouraging the lives of many people who they needed to understand their role within the context of the dynamics of their personalities, within a frame of work of their personal and inter-relationationhips. Thus, the author goes beyond the relationship character traits to a close assessment, to evaluate the motivations and frustrations, as dynamic factors , starting from what a person wants to achieve for herself, and what to expect from the other character, who will always be connected to our congenial espheres. So as we have learned with our Master, with the utmost maxima of Christianity: "Love thy God above all things, and thy neighbor as yourselves." Although it is a difficult mission, we must learn from Him that our solicitude will be in direct reasonal approach, for a reciprocal kind of love