The article concerns the writer’s identity in the old scientific text in the light of Janusz Korczak’s work How to love a child. A child in the family. Attention was also paid to the roles which the author plays in the text. He is identical with the author of the work and he is a doctor, educator and philosopher. The article also discusses the emotional involvement of the author and his pedagogical passion. The history of the book creation was discussed, and then the language forms, through which the subject of the text was revealed, were shown.