To return to a book is to return not just to the text but also to a past self. We are embedded in our libraries. To reread is to remember who we once were, which can be equal parts scary and intoxicating. Other services such as Timehop offer ways to return to past photos or past tweets. They, too, are unexpectedly evocative. Far more so than you might think. They allow us to measure and remeasure ourselves. And if a resurfaced tweet has an emotional resonance of x, than a passage in a book by which you were once moved must resonate at 100x.
Craig Mod, in Aeon