This is essentially an essay of theory of neurosciences. It is not of psychology, that is an applied science, according to me. It is not a popular manual of how to manage our emotions. Despite the aspect, it is not a philosophical paper, but it is obvious the great interest of these disciplines on it. But also of A.I., sociology, theology, and so on. The models are described by a synthetic and unorthodox way. Some passages are very difficult to understand without a solid background (and an open mind too...).