So I want to understand what everyone's going on about concerning MK's stuff, but I'm struggling a little. I've asked for a summary of sorts in several places and got the vaguest, largest answers ever. :/ Could someone please explain it to someone with only a limited understanding of TES lore? I know I've asked about lore a lot, but it is so much to take in, and half of it (to someone not following it intently) just makes no sense and is so wildly out there I can't get my head around it. :/

It's like trying to drink an ocean in one gulp.

P.S. I know people have given me links before, but I'm on my grandma's computer and all those bookmarks are on my home PC forty miles away.

The loveletter is an explanation for why Nirn was made by a Dunmer in the 5th era. At its most basic level is the assertion that Lorkhan had seen the final gradient one could achieve and that he had Nirn made and had himself killed so that the Mundus would act as a springboard to dreaming a new dream (Amaranth) or at very least, ascending above the immortal spirit level all et'ada were stuck in (CHIM).