At the first Mass I attended in grade school, it would have been handy to have had a "Pray Together" book nearby. I was unable to follow what was going on without it. During one portion of Mass, it puzzled me that the congregation seemed to be saying, "Lord, we are burr." That didn't make sense to me, but I thought, "I've heard that God works in mysterious ways."
The next time I attended Mass, I was able to follow along with the "Pray Together" missal. I discovered that the congregation had actually said, "Lord, hear our prayer." I learned that while God works in mysterious ways, he wasn't as cryptic as I'd thought he was a week earlier.