超絶技巧練習曲
Liszt did not charge for lessons. He was troubled when German newspapers published details of pedagogue Theodor Kullak's will, revealing that Kullak had generated more than one million marks from teaching. "As an artist, you do not rake in a million marks without performing some sacrifice on the altar of Art," Liszt told his biographer Lina Ramann. Carl Czerny, however, charged an expensive fee for lessons and even dismissed Stephen Heller when he was unable to afford to pay for his lessons. Liszt spoke very fondly of his former teacher—who gave lessons to Liszt free of charge—to whom Liszt dedicated his "Transcendental Études". He wrote to the "Allgemeine musikalische Zeitung", urging Kullak's sons to create an endowment for needy musicians, as Liszt himself frequently did.