 [I]f one speaks of many spaces, one understands by that only parts of one and the same unique space. And these parts cannot as it were precede the single all-encompassing space as its components (from which its composition would be possible), but rather are only thought in it. It is essentially single [einig]; the manifold in it, thus also the general concept of spaces in general, rests merely on limitations. (A24–5/B39)