Owning dozens (or hundreds!) of unread books is a very physical reminder that there is always more wisdom being added to the world. It is both inspiring and humbling to know that whatever we learn, there will always be new facts, new interpretations, and new ideas to discover.
“Knowing” can be a big problem, because “knowing” prevents “learning.” And so perhaps that’s why the Rabbis urged us to do something very challenging – to “teach [our] tongue to say ‘I don’t know.’”
Either God exists, or God doesn’t. And we have absolutely no control over that fact. And so because there’s nothing we can do about whether there is a God or not, I’ve never found that question to be a particularly interesting one to ask. After all, when the question is framed in that way, there are really only three answers people can give — “Yes, I do,” “No, I don’t,” or “I’m not sure.”