to the above explanation, the
countenance becomes venomous and hurtful, especially to children, who
have a tender and most impressionable body. It is also possible that
by God's permission, or from some hidden deed, the spiteful demons
co-operate in this, as the witches may have some compact with them.

Reply Obj. 3: The soul is united to the body as its form; and the
sensitive appetite, which obeys the reason in a certain way, as
stated above (Q. 81, A. 3), it is the act of a corporeal organ.
Therefore at the apprehension of the human soul, the sensitive
appetite must needs be moved with an accompanying corporeal
operation. But the apprehension of the human soul does not suffice
to work a change in exterior bodies, except by means of a change in
the body united to it, as stated above (ad 2).
_______________________

FOURTH ARTICLE [I, Q. 117, Art. 4]

Whether the Separate Human Soul Can Move Bodies at Least Locally?

Objection 1: It seems that the separate human soul can move bodies at
least locally. For a body naturally obeys a spiritual substance as to
local motion, as stated above (Q. 110, A. 5). But the separate
soul is a spiritual substance. Therefore it can move exterior bodies
by its command.

Obj. 2: Further, in the Itinerary of Clement it is said in the
narrative of Nicetas to Peter, that Simon Magus, by sorcery retained
power over the soul of a child that he had slain, and that through
this soul he worked magical wonders. But this could not have been
without some corporeal change at least as to place. Therefore, the
separate soul has the power to move bodies locally.

_On the contrary,_ the Philosopher says (De Anima i, 3) that the soul
cannot move any other body whatsoever but its own.

_I answer that,_ The separate soul cannot by its natural power move a
body. For it is manifest that, even while the soul is united to the
body, it does not move the body except as endowed with life: so that
if one of the members become lifeless, it does not obey the soul as
to local motion. Now it is also manifest that no body is quickened by
the separate soul. Therefore within the limits of its natural power
the separate soul cannot command the obedience of a body; though, by
the power of God, it can exceed those limits.

Reply Obj. 1: There are certain spiritual substances whose powers are
not determinate to certain bodies; such are the angels who are
naturally unfettered by a body; consequently various bodies may