4. If we had to ascertain the nature of body and the place it holds in the universe, surely we should take some sample of body, say stone, and examine into what constituents it may be divided. There would be what we think of as the substrate of stone, its quantity — in this case, a magnitude; its quality — for example, the colour of stone. As with stone, so with every other body: we should see that in this thing, body, there are three distinguishable characteristics — the pseudo-substance, the quantity, the quality — though they all make one and are only logically trisected, the three being found to constitute the unit thing, body. If motion were equally inherent in its constitution, we should include this as well, and the four would form a unity, the single body depending upon them all for its unity and characteristic nature.
The same method must be applied in examining the Intellectual Substance and the genera and first-principles of the Intellectual sphere.
But we must begin by subtracting what is peculiar to body, its coming-to-be, its sensible nature, its magnitude — that is to say, the characteristics which produce isolation and mutual separation. It is an Intellectual Being we have to consider, an Authentic Existent, possessed of a unity surpassing that of any sensible thing.