And his attitude was very clear [...]. Problems concerning his own oeuvre and its evaluation by himself and others were separate from his activities as a member of the Association of Polish Composers or as a most outstanding critical writer. These were two worlds, in a way, and this seems crucial to me. 

Mycielski set the standards very highly when it came to thinking about Poland – in the sense of seeing Polish and European culture. He knew that in this respect he would not find conversation partners among musicians, composers – he could talk with Iwaszkiewicz, for example. Incidentally, after the attack on Czechoslovakia he was the only musician to react.

^{From the interview conducted by Beata Bolesławska-Lewandowska 
(Mycielski. Szlachectwo zobowiązuje, Kraków 2018)}