Kevin Mims writes in the New York Times:
The sight of a book you’ve read can remind you of the many things you’ve already learned. The sight of a book you haven’t read can remind you that there are many things you’ve yet to learn. And the sight of a partially read book can remind you that reading is an activity that you hope never to come to the end of.
I probably have two or three unread books because I could not get through them and thinking of getting rid of them. Maybe I should just keep them for now.