The principles of the physical patterns of self-organization are numerous, different upon various levels of the scale of complexity. The integrated pattern of the changes going on in a living body indicates an integrated nature of its principle - whatever it might happen to be. Aristotle called this kind of principle „psycho", H. Driesch called it „entelecheia", sociobiolo- gists believe that D N A is the right name for it. The fundamental problem consists in seeing - not just deciding a (...) priori - if the empirical data do require - in a living organism - a single, integrating agency. If such a requirement originates in an illusion, the whole problem is fictitious. If this requirement is well founded, then we must to search for such an agent. (shrink)