 There is a further issue with Hume’s treatment of causation that is largely suppressed in the Enquiry but that was evident in the Treatise, namely, that although, as we saw in the last passage quoted, Hume sometimes describes necessary connection as being displaced from the object to the mind, on his own strict interpretation of empiricism there is a problem in positing the existence of either objects or minds distinct from perceptions. This is what pushes Hume towards his own form of idealism. That is, although we naturally speak of perceptions as being of objects and in or by the mind, on the view that all knowledge is founded on perception and that in perception we are immediately acquainted with nothing but perceptions, it becomes problematic how we could have knowledge either of the mind itself or of any object of perceptions distinct from those perceptions. Hume puts the former point succinctly by arguing that we have no perception of the self distinct from our perception of its perceptual states: