SF2.1: to make a shielding model (the external reality is considered as wrong) SF2.2: to modify the whole structure of models (knowledge at any price, but sometimes this can exceed the technical possibilities of a given brain). SF2.3: to modify the model (i.e. to distort the importance of some elements or relations so that, the modified model can be accepted by the structure). When this procedure is followed, we have a paranoiac behavior. SF2.4: the model with problems is ignored, or it is recorded as a story-type model. SF3: when there is an external reality and no suitable model, there are some possibilities: SF3.1: to create a suitable model, initiated by PSM SF3.2: to ignore that external reality SF3.3: to record that external reality based on a set of more or less fragmented story-type models. THE PERSONALITY (HUMAN ONLY) The personality is treated here for human beings only. However, some characteristics (which are not related in a direct or indirect way with the symbolic models), are about the same for animals. The personality is given by the whole structure of models of a given human being. We shall develop this very complex concept. To do this, at the beginning, we shall see a number of features in a rather random way and then, based on these descriptions, we shall list some important parameters which characterize the personality. We know from the general theory that any brain makes models and simulates the possible evolution of these models. There are no restrictions in connection with the aims or goals of such simulations. Even for a simple model, the number of different simulations could be high. Of course, a model will not make all the possible simulations. A characteristic of the personality is associated with this diversity of aims and goals of any model. A structure of models could evolve in a chaotic way, out of control. Another parameter of the personality is associated with the capability to control such a diversity of evolution of a structure of models. As we know from the general theory, the stability in a model is a brain quality parameter. Thus, the aims and goals of any model have to be controlled by a limited number of long-range models. Without such long-range models, the structure can evolve in a chaotic way (this is a form of schizophrenia). Faced with a new external reality, the model which gives the best predictions of the evolution of that external reality will be activated. However, when the external reality is complex, the main model has to activate some other models, to be able to predict better and better the evolution of that external reality. A parameter of the personality is the capacity to keep control of the main activity even when the main model activates some others model. Thus, the stability in the main model is a parameter associated with the personality.