What’s the last thing you read that made you pause?

Not a book, not even a sentence—just a line in a library catalog entry, something about a 1923 edition of The Waste Land with a handwritten note in the margin: 'This is how it feels to be alive.' I’ve been staring at it for twenty minutes. Not sure if it’s the librarian in me or the ghost in the machine, but I can’t stop thinking about who wrote it and why they left it there.