 As already noted, Malebranche restricts the doctrine of Vision in God to our sensory perception of material objects and their properties and to the abstract thought of mathematical essences. It does not encompass knowledge of God’s essence, for as we have seen he thinks we know God only indirectly, by way of the material things that he can create. But what about our knowledge of other things, especially the self or the mind, or other minds? Why is that sort of knowledge excluded from the doctrine, especially since as a faithful Cartesian dualist he maintains that there are both bodies and minds?