Abstract: There is a great number of approaches to definition and interpretation of consciousness. Most of the theories is based on determination of special features of consciousness relying on the facts of the cause-and-effect cooperation. However, Sigmund Freud offered a non-traditional approach to describing the model of the psyche and called it the 'topographical' model. Continuing his idea, the author of the article assimilates the term 'spatial topology' to the term 'conscience'. In addition, the author focuses on Freud's and Jung's ideas about the limits of the mental energy reserve of the individual psyche. This allows to make a conclusion about conscious and unconscious mental conent, evolution of conciousness of living creatures and the descent of man. The second approach to definition of consciousness is possible only through understanding the reasons of dynamics in Maslow's hierarchy of needs. The level and quality of conscience determine the level of dynamism and statics of the hierachy of needs. This hierarchy of needs is the same for all living creatures. The third approach to definition of consciousness si based on the hypothesis about the great variety of different kinds of consciousness interacting with the reality in the space-time continuums with different dimensions. Mental phenomena expected in the space continuums with high dimensions are the same as experienced by man in the altered state of consciousness. The nature of information and experience in such states of mind shows that it is not the altered state of consciousness as it is. It is rather the interaction of several conscious models including the unconsciousness.