But now the mind listens to the voice of Reason which, for every given magnitude,--even for those that can never be entirely apprehended, although (in sensible representation) they are judged as entirely given,--requires totality. Reason consequently desires comprehension in _one_ intuition, and so the _presentation_ of all these members of a progressively increasing series. It does not even exempt the infinite (space and past time) from this requirement; it rather renders it unavoidable to think the infinite (in the judgement of common Reason) as _entirely given_ (according to its totality). But the infinite is absolutely (not merely comparatively) great. Compared with it everything else (of the same kind of magnitudes) is small. And what is most important is that to be able only to think it as _a whole_ indicates a faculty of mind which surpasses every standard of Sense. For [to represent it sensibly] would require a comprehension having for unit a standard bearing a definite relation, expressible in numbers, to the infinite; which is impossible. Nevertheless, _the bare capability of thinking_ this infinite without contradiction requires in the human mind a faculty itself supersensible. For it is only by means of this faculty and its Idea of a noumenon,--which admits of no intuition, but which yet serves as the substrate for the intuition of the world, as a mere phenomenon,--that the infinite of the world of sense, in the pure intellectual estimation of magnitude, can be _completely_ comprehended _under_ a concept, although in the mathematical estimation of magnitude by means of _concepts of number_ it can never be completely thought. The faculty of being able to think the infinite of supersensible intuition as given (in its intelligible substrate), surpasses every standard of sensibility, and is great beyond all comparison even with the faculty of mathematical estimation; not of course in a theoretical point of view and on behalf of the cognitive faculty, but as an extension of the mind which feels itself able in another (practical) point of view to go beyond the limit of sensibility.