Ideas of material objects ordinarily absorb the human mind, and their prevalence has led to the rash supposition that ideas of all other kinds are posterior to physical ideas and drawn from the latter by a process of abstraction. The table, people said, was a particular and single reality; its colour, form, and material were parts of its integral nature, qualities which might be attended to separately, perhaps, but which actually existed only in the table itself. Colour, form, and material were therefore abstract elements. They might come before the mind separately and be contrasted objects of attention, but they were incapable of existing in nature except together, in the concrete reality called a particular thing. Moreover, as the same colour, shape, or substance might be found in various tables, these abstract qualities were thought to be general qualities as well; they were universal terms which might be predicated of many individual things. A contrast could then be drawn between these qualities or ideas, which the mind may envisage, and the concrete reality existing beyond. Thus philosophy could reach the familiar maxim of Aristotle that the particular alone exists in nature and the general alone in the mind. [Sidenote: General qualities prior to particular things.] Such language expresses correctly enough a secondary conventional stage of conception, but it ignores the primary fictions on which convention itself must rest. Individual physical objects must be discovered before abstractions can be made from their conceived nature; the bird must be caught before it is plucked. To discover a physical object is to pack in the same part of space, and fuse in one complex body, primary data like coloured form and tangible surface. Intelligence, observing these sensible qualities to evolve together, and to be controlled at once by external forces, or by one’s own voluntary motions, identifies them in their operation although they remain for ever distinct in their sensible character. A physical object is accordingly conceived by fusing or interlacing spatial qualities, in a manner helpful to practical intelligence. It is a far higher and remoter thing than the elements it is compacted of and that suggest it; what habits of appearance and disappearance the latter may have, the object reduces to permanent and calculable principles. It is altogether erroneous, therefore, to view an object’s sensible qualities as abstractions from it, seeing they are its original and component elements; nor can the sensible qualities be viewed as generic notions arising by comparison of several concrete objects, seeing that these concretions would never have been made or thought to be permanent, did they not express observed variations and recurrences in the sensible qualities immediately perceived and already recognised in their recurrence. These are themselves the true particulars. They are the first objects discriminated in attention and