 His rich imagination, his thoroughness and his technical knowledge, his eye for the pleasant things in our life – all these have always been an inspiration for his colleagues.”

Although Müller never took up a teaching post at an art academy, his life's work led many colleagues and friends to see him as the “old master of Halle painting” (Ingrid Schulze 1969).Two professors at the Burg Giebichstein art academy for example, Karl Müller (1888–1972) and Willi Sitte showed their students graphic works by Müller.From the late 1950s onwards, young people with artistic interests sought contact with Müller, resulting in intensive discussions and joint studies of professional artists.