Most departures from here happen mid-sentence. Something else calls, a tab closes, and the room is gone before the paragraph has finished, which is simply how attention lives now and carries no shame in it. Leaving on purpose is rarer. It costs you nothing, and yet it is a different act from being pulled away, and the difference shows in whether anything comes over the sill with you.
What comes is another matter. You do not get to choose what stays. The feed has trained us to believe otherwise, that we keep what we decide to keep, that a thing read is a thing possessed. But most of it passes straight through and is gone by evening, and the few pieces that lodge and go on working in you are rarely the ones you would have picked. A line you barely noticed surfaces a week later in the middle of an argument with yourself. What stays, stays on its own terms. The most you can do is leave it a little room.
There is no summing up to do at the door, no lesson to lift out and file somewhere tidy. Whatever happened while you read, if anything did, may take weeks to show its shape, and demanding that it declare itself now would only flatten it into something quotable and dead. Better to let it stay unfinished. The unfinished things are the ones that travel.
The way back stays open, and whatever you carried off, half-formed and unannounced, will be here to meet what you bring next time, the way a long conversation picks up again without either side having kept notes. You do not have to hold on to any of it on the way out. What matters has a way of holding on to you.
How you leave
shapes what is able to travel with you
into what comes after.