While I understand the “yay intellectual freedom” underpinnings of the original quote, I’ve never been a big fan of it. The implication that the measure of greatness is directly related to creating repulsion somewhere in the library collection has never sat well with me. I concede that this is not the ultimate grading system for the value of a library, but as this is an oft repeated phrase I think it earns some scrutiny as to what it seeks to convey to the listener.
Inspire is the word I substituted because I feel the emphasis should be on what a library can do for a person rather than how it could drive one away. What word would you have put there? Are there other library sayings that could use a little modification of their own?