Too often our concept of learning is to absorb ideas from books, to do what others tell us to, and perhaps to do some controlled exercises. But this is an incomplete and fearful concept of learning... Cut off from practical experience.
We are creatures who make things; we don't simple imagine them. To master any process you must learn through trial and error. You experiment, you take some hard blows, and you see what works and what doesn't work in real time. You expose yourself and your work to public scrutiny. Your failures are embedded in your nervous system; you do not want to repeat them. Your successes are tied to immediate experience and teach you more. You come to respect the process in a deep way because you see and feel the progress you can make through practice and steady labor. Taken far enough, you gain a fingertip feel for what needs to be done because your knowledge is tied to something physical and visceral. And having such intuition is the ultimate point of mastery.