Imagine riding a complicated roller coaster and keeping track of how far along you are on the track, how you’ve been turning, and how you’ve been twisting. That much is easy.
What is not easy is appreciating that that’s all you need. You can dispense with extrinsic coordinate systems entirely.
“These three variables [Reworking, Referencing, Releasing] together can measure your progress along any path to mastery. What’s more, they can be measured intrinsically, without reference to any external map of disciplinary boundaries. ”