Librarians are amazing, no doubt. They are an invaluable source of information because they seemingly know everything about everything, especially in a subject library. If they're a science librarian, for instance, they must know everything about chemistry AND physics.
Let me let you in on a little library secret.
It's not true.
We don't know everything.
We do, however, know how to find it. We might have to ask you a lot of questions to do so, and we may lead you down the wrong path at first. But, I promise, if we're patient with each other, not only will we find what you're looking for, you'll learn how to find it on your own next time.
So, please don't be surprised if I don't know right away where to find the Chinese landscapes or the self-portraits of that one guy from Finland, or if they'll be the ones you like, rather than the ones you don't.
We'll like each other a lot more that way.