  Holbach maintains something like Locke’s distinction between primary and secondary qualities, but he does not insist that the properties of bodies that Locke calls secondary qualities, are properties that bodies possess in virtue of particular primary qualities. Matter, for Holbach, is whatever makes up bodies and causes the sense impressions that we have of them. Matter, in general, may be said to have properties in the sense that there are some properties that anything which is matter will possess. These properties are roughly the Lockean primary qualities (with the important exception of motion, of which more below). However, Holbach holds that matter is a class, rather than a particular thing, since different objects may possess different properties as well: