The evolution of the brain is, however, slow on the scale of human active life, even if the evolution accelerates. We are on a level development of the brain on which, in domains where image models were leading (e.g. nutrition), symbolic models are gaining ground. ETA 27: Principial negative effects associated with the functioning of a brain 1. There is a principial problem, when we ask a question. In order to have an understandable answer, we need to be within the model which generates the answer. Without this condition, the answer will be nonsense. To put it differently: not any question is permitted. Example: The nature of light can be understood only within the framework of Quantum Mechanics. If we are not familiar with Quantum Mechanics, the answer to the question about the nature of light is nonsense. From outside Quantum Mechanics, light seems to be both wave and particle, and this statement cannot be understood based on logic. In case of children, the questions in the class "why..?" cannot generally have any answer, as the children haven't got the suitable models. However parents have an answer to any of the children's questions. The answer with the stork bringing the babies is famous. The educational system should take into account these issues. For instance the 'why' questions should not be encouraged, and favour the "what is this?" type questions. This means that, for children, parents should show them the elements associated with external reality and their relation/interconnections. Children will build alone models and they will find themselves the answers to the questions of 'why' type. 2. When you can't do what you want, you do what you can... Here we open Pandora's box. In the majority of cases in everyday life, we cannot do what we want or we can't turn back time after a failure. These problems can generate building and activation of illogical action models starting with revenge and resignation as individual acts, and ending with wars. The reason is associated with the tendency of any model to evolve towards stability, in the conditions when the model cannot stabilize in any situation. For instance, by revenge, in a way or another, one can find a stability of the model, by attaching to it another model (this model is a shielding model). Resignation means building a suitable shielding-type model associated to the model with problems. The most important and well-known shielding model, associated to resignation, is religion. All shielding models are associated with the term 'illusion'. The illusion is defined as the reality generated by a shielding model. The education system should take into account these classes of problems and find solutions to avoid them.