Spend Time in Study at the Library

You decide to take a book down from the shelves titled "Principia Philosophiae." It uses a lot of big words and it's hard to grapple with, but it does use proper Common, so you at the very least understand each individual word. The order they are used in, however, is what boggles your mind. Especially this concept, "I think therefore I am." You're not sure you agree with the idea of a single deity though, after all there's a deity sitting right next to you. You wonder where this book came from and ask Hades such. "Ah, that came from the old realm; some of us regularly make trips there. Sadly not a whole lot is still written in Common there; mostly they've split into various languages. One resembling gnomish is particularly popular. I personally got my library from my friend Mary." "Mary?" "Yes, Mary." Seems he won't be elaborating on that point.

You go back to your book and comb through, trying to grapple with various points. At least that conversation explains the obsession with a single creator deity from - it's from another world entirely! After an hour or so, you feel like you've made some progress with broadening your understanding and doubt you would be able to make any more any time remotely soon.