1. Living organisms are characterized by complexity and uniqueness of structure, as well as by specific pattern of changes during ontogenesis programmed in their own genome.2. Although general mechanisms of gene expression and regulation are well understood, our knowledge of spatial morphogenesis is rather limited and patchy despite discovery of homeotic genes.3. Developmental biology is able to explain principles of formation of neuronal network in the brain, whereas neurophysiology provides detailed information on the role of various neurotransmitters, but we still (...) do not understand the essence of consciousness, and even more self-consciousness of the man.4. Some philosophical theories trying to explain the nature of self-consciousness, such as parallelism and interactionism, are briefly discussed. (shrink)