The page feels easier the second time. The words arrive smoothly; the idea seems close.
But recognizing an idea in front of you isn’t the same as bringing it back later. Rereading can build familiarity. Trying to recall what you learned—before looking—often supports later recall more, and shows what still needs attention. How much it helps varies with the learner, material and practice.
Close the page. Say or write what you remember. Then check: what came back, and what needs another look?
A blank moment isn’t proof you can’t learn it. It shows you where to return.