The decades of Demidov's research and practice resulted in a series of written texts. His thoughts are surprisingly deep, original and modern. The other founder of the Moscow Art Theatre, Vladimir Nemirovich-Danchenko, echoed Stanislavsky in highly praising Demidov's work and its immense creative potential. The roots of Demidov's love for theatre and his practical knowledge of the stage can be traced to his childhood and young adulthood. In 1907, upon completing high school, Demidov moved to Moscow and was accepted to the Moscow University's Medical School. The 25-year-old medical student, fascinated by the theatre arts, interested Stanislavsky. In fact, Stanislavsky's respect for Demidov was so high that he entrusted Demidov with his son Igor's physical and moral education. The company of doctor Demidov was a great asset to Stanislavsky who, during these years, was forming his "system" of actor training. The significance of Demidov's "etude technique", as the foundation of the actor training, is difficult to overestimate.