Wherefore the object of our mind is the body as it exists, and nothing else.

Q.E.D.
Note .-- We thus comprehend, not only that the human mind is united to the body, but also the nature of the union between mind and body.

However, no one will be able to grasp this adequately or distinctly, unless he first has adequate knowledge of the nature of our body.

The propositions we have advanced hitherto have been entirely general, applying not more to men than to other individual things, all of which, though in different degrees, are animated.[3] For of everything there is necessarily an idea in God, of which God is the cause, in the same way as there is an idea of the human body; thus whatever we have asserted of the idea of the human body must necessarily also be asserted of the idea of everything else.

Still, on the other hand, we cannot deny that ideas, like objects, differ one from the other, one being more excellent than another and containing more reality, just as the object of one idea is more excellent than the object of another idea, and contains more reality.
[3] "Animata" Wherefore, in order to determine, wherein the human mind differs from other things, and wherein it surpasses them, it is necessary for us to know the nature of its object, that is, of the human body.