"I started in 1967, to put my poems together using my voice on record and in recitals before millions of people. This was following the example of Bob Dylan's first meaningful and self-published poetry [...] 1982 was certainly the zenith of that career, where I had to stop my concerts. I realized at this point, it was spoiled for me, because at 8 pm, I had to act gifted in front of a few thousand listeners, just because they had paid for admission." – Heller in the liner notes of "Kritische Gesamtausgabe" published in 1991.