Exercise of excellence and virtue doesn't seem objective either. I also don't see the value of a book that's not entertaining. Unless it's educational or something.
Well, whether the creator of the work exercised a particular virtue or excellent skill in the creation of the work can be reasonably objective. It is, in particular, objective in a way that the work's being liked is not: it is independent of the observer.
Quotes are a unique enough medium of expression that I'm interested in viewing quotes that people have found collectable, emotionally impactful, useful, memorable, or otherwise noteworthy - perhaps others are similarly interested. To clarify, these need not be even remotely related to rationality. I'm hijacking the mandates traditionally used for the Rationality Quotes thread, with a few modifications:
Please post any meta discussion in the top-level comment named "Meta".