EN
The author presents surveys of M. Csikszentmihalyi and concept of flow. It results that there is an essential connection with optimum conditions of life experience by human. Needs of understanding and establishing the flow phenomena called for introduction of original i.e. mixed model of personality consisted of hierarchical levels of "I", "ego" together with vertical structure of "self". Optimum conditions of elements and functions of "I" give a possibility to live "ego" confirming larger and larger quality of life and it is felt by "self" in the scale from suffering to happiness. Surfeit of this feeling lead to the development. (original abstract)