On some intuitive level, I knew that learning had to be more than the mastery of facts. I've experienced it as an adult. I become consumed with a subject like quilting or preparing yogurt cultures, and that topic takes over my life - fabric scraps scattered on the floor, little jars of white sludge cuddled by blankets on my kitchen countertops. When I learned to play guitar in my thirties, no one had to schedule my practices. My guitar lived on a stand in the living room and I tormented our ears multiple times a day until my fingers bled. Passion for learning has that fiery, consuming, can't-stop quality.