The grasp of objectivity requires a grasp of spatiality as that within which objects can be located, related and distinguished both from one another and from oneself as the cogniser of those objects. Similarly, the grasp of other persons also requires a grasp of the externality of space. The idea of a connection between the subjectivity of others and spatiality is something explicitly recognised by Henri Bergson. As Bergson writes, ‘the intuition of a homogenous space is already a step towards social life … probably animals do not picture to themselves, besides their sensations, as we do, an external world quite distinct from themselves, which is the common property of all conscious beings. Our tendency to form a clear picture of this externality of things and the homogeneity of their medium is the same as the impulse which leads us to live in common and to speak.’