MattVIP: “Ka was like a wheel, its one purpose to turn, and in the end it always came back to the place where it had started.” Thankee-sai, you speak truth!
The ending was foreshadowed since the beginning, but I can't believe I failed to see Flagg's quote you mentioned in a broader sense as it pertains to the ending, especially because the Golgotha palaver is probably my favorite part of the entire series.
There are moments when you reread bits or go back over things and realise just how fucking clever King is. Here is one that blows my mind...
Before ever reading The Dark Tower series one of the first of King's books I read was Lisey's Story. I loved it and it's really what made me a big fan. Anyways a running theme of this book is a thing called a "blood bool", kind of like a practical joke. You pull off the joke and it's "bool, the end". That's a very vague generalisation of the theme as there's a lot more to it, but you catch my drift. So years later I read the dark tower novels, which bear in mind were written many years before Lisey's Story, and there is a line in one of them. I can't remember which, and I'm positive this line appears once in the entire series, and would not even make any sense when read by someone who had not read Lisey's Story. The line, obviously, is "bool, the end".
When I read that line in the dark tower series I was like WTF!? How did he know to put this one random, almost senseless to anyone but him, line in a book, because years later he'd write an entirely unrelated novel in which it would be a key theme!? The guy is a genius. Or he stuck it in a later rewrite in which case the joke's on my. Bool, the end.