  Before leaving this issue, it is worth noting briefly that space reappears later in Being and Time (70: 418–21), where Heidegger argues that existential space is derived from temporality. This makes sense within Heidegger's overall project, because, as we shall see, the deep structure of totalities of involvements (and thus of equipmental space) is finally understood in terms of temporality. Nevertheless, and although the distinctive character of Heidegger's concept of temporality needs to be recognized, there is reason to think that the dependency here may well travel in the opposite direction. The worry, as Malpas (forthcoming, 26) again points out, has a Kantian origin. Kant (1781/1999) argued that the temporal character of inner sense is possible only because it is mediated by outer intuition whose form is space. If this is right, and if we can generalize appropriately, then the temporality that matters to Heidegger will be dependent on existential spatiality, and not the other way round. All in all, one is tempted to conclude that Heidegger's treatment of spatiality in Being and Time, and (relatedly) his treatment (or lack of it) of the body, face serious difficulties. 