Lydia Davis, Essays One (New York: Farrar, Straus and Giroux, 2019), p. 173:
Be mostly self-taught. There is a great deal to be learned from programs, courses, and teachers. But I suggest working equally hard, throughout your life, at learning new things on your own, from whatever sources seem most useful to you. I have found that pursuing my own interests in various directions and to various sources of information can take me on fantastic adventures: I have stayed up till the early hours of the morning poring over old phone books; or following genealogical lines back hundreds of years; or reading a book about what lies under a certain French city; or comparing early maps of Manhattan as I search for a particular farmhouse. These adventures become as gripping as a good novel.