Libraries allow children to ask questions about the world and find the answers. And the wonderful thing is that once a child learns to use a library, the doors to learning are always open.
To be successful in anything, you have to have a passion for it, and that leads to being enthusiastic and demanding. I didn't have it for history. So I wouldn't have been a good teacher in that area. But I had it for basketball. And that's what coaching is at every level: it's about teaching.