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What do you mean when you say that things are "progressing" towards infinity? The Snyder-Oppenheimer model, now pre-eminent, implies an expanding universe - but to what exent can it "progress" towards infinity? One might say: "The universe has been growing in mass since its birth; and it will continue to, for an infinite amount of time. When it has done so, it will thereby have an infinite mass". This line of argument is easily controverted. For if a point takes an infinitely long time to reach, it can, by definition, never be reached: no matter how much time has passed, there will always be more to go. It is incumbent on us, then, to define infinity. There is a tendency in aesthetics to associate the infinite with the sublime, (Dilthey and Nietzsche) but I recoil aginst this explanation because it is purely psychologistic. Another, parallel possibilility is this: we say that the infinite is the unquantifiable. This explanation, though demystifying, fails on account of the fact that it imperils the infinite's status as a number. A number must be quantifiable. And it is no good saying that the infinite stands for those numbers which cannot be known, because a number can only have one value, and there are, conceivably, a plurality of unknown numbers. Either infinity is suceptible of precise definition or it must be dismissed as a mere phantasm, as simulacra. One does present itself, the author of which is Kant: it is simply that the infinite is the largest possible number. And, defined thus, infinity is more efficacious than 'most numerate', for the cleavage between "permutations" and "reality" evaporates. The largest possible number is a concantenation of the facts. We need not imagine "repetitions" of "permutations" - that is, we need not split reality up into atomic parts - for the infinite is simply the totality of things in the world. Set theory cannot have recourse to such a category, since the "set of all sets" only connotes that part of reality which has been matematically documented.
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