I learned how to comport myself among trolls, elves, hobbits or goblins. I learned that a friend can be lost to greed and avarice. I learned that solving riddles may be as important a survival skill as bowmanship. I know how to talk to a dragon, and that it's best not to.
I think when I started to write 'The Mysterious Benedict Society' that I had that kind of thing in mind - the notion of having to be able to solve puzzles and riddles because enormous stakes rode upon your ability to do that.
A lot of the lyrics I write involve images that just swing the song in a way that feels really good to me and there isn't a literal explanation. They're not riddles for the listener to solve.