Okay, so here are a couple questions that I'd like to throw at you lore-experts. I'm trying to be a lore-expert myself, but my only resources, until recently, have only been from in-game lore. So there are a couple gaps, and a couple other things I would just love a quick explanation of. And sorry ahead of time if any of this comes off as dumb.

1: What is "Loveletter from the 5th Era" or whatever it's called?
2: What Is CHIM?
3: What is the Amanrath?
4: What's this whole dreamsleeve deal?

Thank you ahead of time for any answers, and try not to blow my mind too much. I still need to sleep tonight.

Hello!

1. The loveletter is one of MK's obscure texts. You can read it here: http://www.imperial-library.info/content/loveletter-fifth-era-true-purpose-tamriel

It is a message that has been sent back in time to the fifth era (yes, which is still in our future) to warn of a cataclysmic event called "Landfall", and how to avoid it - by achieving Amaranth.

2. CHIM is realizing that Tamriel, and thus you, are part of the dream of an all-powerful being (and thus you have no individuality) while still defiantly maintaining your sense of self. In effect, you become a lucid dreamer with incredible power to manipulate the dream. Think Matrix.

3. Amaranth is a form of godhood beyond CHIM. Amaranth is when you escape the dream completely and become the dreamer of something new.

4. The Dreamsleeve is a conduit for recycling souls after they die. It is also used as a communication channel by powerful mages (ie memospores)