A closer analysis of the precise nature of this immaterial extension, as the mature More conceived it, together with related notions such as those of ‘essential spissitude’ and ‘hylopathia’. Once More had concluded (i) that space not only possessed an infinite immaterial extension but was also something real (Chaps. 3 and 4), and (ii) that God also possessed an infinite immaterial extension (Chap. 5), the way was finally clear for him to identify those two infinite immaterial extensions with one another, and to declare that the space that underlay bodies was in fact divine. I discuss this theory, and its reception by people like Newton and Clarke.