One of my very favorites, too (obviously - look who started this thread).
And I agree that he summed it all up quite nicely.
What is your theory on why Donnie was chosen to go through the wormhole (or looking glass) and live in the parallel universe (Wonderland?) for a while before he dies, Susie?
Maybe it's saying that we all do that right before we die, in a way? Kind of like "Jacob's Ladder" (ever see that one with Tim Robbins?).