which he begins to be moved; but while he is actually in
movement, he is in part of the first place which he quits, and in part
of the second place which he occupies. This very fact that he can
occupy the parts of two places appertains to the angel from this, that
he can occupy a divisible place by applying his power; as a body does
by application of magnitude. Hence it follows regarding a body which
is movable according to place, that it is divisible according to
magnitude; but regarding an angel, that his power can be applied to
something which is divisible.

Reply Obj. 2: The movement of that which is in potentiality is the
act of an imperfect agent. But the movement which is by application
of energy is the act of one in act: because energy implies actuality.

Reply Obj. 3: The movement of that which is in potentiality is the
act of an imperfect but the movement of what is in act is not for any
need of its own, but for another's need. In this way, because of our
need, the angel is moved locally, according to Heb. 1:14: "They are
all [*Vulg.: 'Are they not all . . . ?'] ministering spirits, sent to
minister for them who receive the inheritance of salvation."
_______________________

SECOND ARTICLE [I, Q. 53, Art. 2]

Whether an Angel Passes Through Intermediate Space?

Objection 1: It would seem that an angel does not pass through
intermediate space. For everything that passes through a middle space
first travels along a place of its own dimensions, before passing
through a greater. But the place responding to an angel, who is
indivisible, is confined to a point. Therefore if the angel passes
through middle space, he must reckon infinite points in his movement:
which is not possible.

Obj. 2: Further, an angel is of simpler substance than the soul.
But our soul by taking thought can pass from one extreme to another
without going through the middle: for I can think of France and
afterwards of Syria, without ever thinking of Italy, which stands
between them. Therefore much more can an angel pass from one
extreme to another without going through the middle.

_On the contrary,_ If the angel be moved from one place to another,
then, when he is in the term "whither," he is no longer in motion, but
is changed. But a process of changing precedes every actual change:
consequently he was being moved while existing in some place. But he
was not moved so long as he was in the term "whence." Therefore, he
was moved while