In the Boston music scene at the time of Keith Jarrett’s stunning masterpiece, The Köln Concert, there was a tale going around about the development of his virtuosity. It was said that he had a Russian piano teacher who trained him with great precision and powerful discipline. She trained him in a path to mastery. She asked him, it was said, to spend eight hours each day playing one note on the piano – one note only – every day for a week. She asked him to dedicate himself to knowing each of the notes intimately. He spent eighty-eight weeks, the story goes, doing just that. He came to intimately know the eighty-eight keys.
Singh, K.D. (2017). Unbinding: The grace beyond self. Somerville, MA: Wisdom Publications, p. 89.