I heard Edwin Fischer, who did not mean much to me. I heard another pianist in Berlin who had a big success and I thought he was awful — Mischa Levitzki. Just fingers, and you cannot listen only to fingers. There is a difference between artist and artisan. Levitzki was an artisan. But Ignaz Friedman, who I admired, was a great artist. He had wonderful fingers and a very personal, individual way of playing, even if some of his ideas were very strange to me. He had no hesitation touching up the music. I got annoyed with him at one concert when he changed the basses in Chopin's F minor Ballade. I didn't like that. For some reason he was happier making records than he was on the stage.

quoted in Harold C. Schonberg, Horowitz: his life and music