I've been thinking about this from time to time for some time now. I can usually fathom absolute nonexistance, but only for a second or two, before my brain sets in trying to process the implications of that in the context of all existance. I think that's the problem, that absolute nonexistence is actually beyond the scope of what we understand as reality, so the brain has a very hard time just processing it for what it is (or rather, what it is not).

Perhaps I should meditate on that.