A search for perfection in a chaotic, never-understandable world often ends up with writing poems... A chaos, organized into the lines on a white paper, could be made more attractive, visible and even more friendly - by using the poetry laboratory instrument and tools. Theorem Z is the theorem of perfection, of the harmony and its distortions, the symbol could be roughly described as a circle (or a Zero). A clue to the theorem - on page 52. The main character of the book is Semyonov, a russian intelligent, 'hoi polloi' and a street philosopher. He belongs to the plebs rather than to aristocracy. Semyonov's poetic reflections and meditations (basically 'hoi-polloi-ish') keep him well in the balance with the outer world. The book is bilingual and it is recommended to those English speakers, who are interested in learning Russian. 104 pp.