If you've ever been to my room, you've probably said it. Everyone does. They open the door, their eyes widen, and they say "Oh, you've got a lot of books." Usually, if they're someone I'm fond of, they say it with a reverence in their voice, a kind of delighted awe that trails off into an excited perusal of the shelves, a quiet inspection of just which ones I do have. Sometimes, and this is rare, they're surprised, even a little bit taken aback. Those people aren't generally invited back.
Those people, though, may have a point. At the moment, I have five bookcases in my room, all overfull, all tightly packed and stacked and some of them with even more books on top. I also have several piles of books on my reading chair, and a few more books on the floor. In an attempt to reduce clutter and keep all of the books contained in shelves, I'm trying to get rid of a few. It's hard.
My current rule is that I have to get rid of something every day. It doesn't have to be a book (because I have lots of other clutter, too), but it's good if it is. I'm not sure I'll ever do quite as well as this anonymous academic, though.