"I could easily believe that Aristotle had stumbled, but not that, on entering physics, he had totally collapsed. Might not the fault be mine rather than Aristotle's... Perhaps his words had not always meant to him and his contemporaries quite what they meant to me and mine. ...I was sitting at my desk with the text of Aristotle's Physics ...Suddenly the fragments in my head sorted themselves out in a new way, and fell into place... My jaw dropped, for all at once Aristotle seemed a very good physicist... of a sort I'd never dreamed possible. Now I could understand why... [and] what he'd said, and... his authority... Statements that had... seemed egregious mistakes, now seemed at worst near misses within a powerful and generally successful tradition. That sort of experience—the pieces suddenly sorting themselves out and coming together in a new way—is the first general characteristic of revolutionary change... Though scientific revolutions leave much piecemeal mopping up to do, the central change... involves... relatively sudden and unstructured transformation in which... the flux of experience sorts itself out... and displays patterns... not visible before."