This paper presents a profile of Ludwik Hirszfeld (1874-1954) as an educator of medical personnel. Hirszfeld was an eminent immunologist, bacteriologist and seroanthropologist; the originator of the Polish school of immunology; a professor at Warsaw University, Maria Sklodowska-Curie University in Lublin and the University and Technical University in Wroclaw; and the founder of the Institute of Immunology and Experimental Therapy in Wroclaw. An account of his relations with university students and junior research personnel - relations based on respect, on multi-faceted assistance in everyday life, but above all on a love for science - is presented, depicting Hirszfeld as a teacher of scientific thinking.