Since i'm a library worker, I kind of lost my reverence for books - part of my job is ripping the pages out of discarded items so they can be sent to the recycling place (the covers have plastic on them and can't go). The first year I worked there, every time I had to do it I'd twitch.
These days... well I still love books. But I'm not so scared to rip them up! If it helps, pick up books that either violently oppose your personal values (then you can say "Take that person who disagrees with me!" *slash slash*) or books by authors you can't stand ("bestseller my arse, take THAT lousy plot devices!")