ressions of the heavenly bodies, by virtue of which the inferior
powers can be changed, has less influence on the will, which is the
proximate cause of human actions, than on the intellect.

To maintain therefore that heavenly bodies are the cause of human
actions is proper to those who hold that intellect does not differ
from sense. Wherefore some of these said that "such is the will of
men, as is the day which the father of men and of gods brings on"
(Odyssey xviii 135). Since, therefore, it is manifest that intellect
and will are not acts of corporeal organs, it is impossible that
heavenly bodies be the cause of human actions.

Reply Obj. 1: The spiritual substances, that move the heavenly
bodies, do indeed act on corporeal things by means of the heavenly
bodies; but they act immediately on the human intellect by
enlightening it. On the other hand, they cannot compel the will,
as stated above (Q. 111, A. 2).

Reply Obj. 2: Just as the multiformity of corporeal movements is
reducible to the uniformity of the heavenly movement as to its cause:
so the multiformity of actions proceeding from the intellect and the
will is reduced to a uniform principle which is the Divine intellect
and will.

Reply Obj. 3: The majority of men follow their passions, which are
movements of the sensitive appetite, in which movements of the
heavenly bodies can cooperate: but few are wise enough to resist
these passions. Consequently astrologers are able to foretell the
truth in the majority of cases, especially in a general way. But not
in particular cases; for nothing prevents man resisting his passions
by his free-will. Wherefore the astrologers themselves are wont to
say that "the wise man is stronger than the stars" [*Ptolemy,
Centiloquium, prop. 5], forasmuch as, to wit, he conquers his passions.
_______________________

FIFTH ARTICLE [I, Q. 115, Art. 5]

Whether Heavenly Bodies Can Act on the Demons?

Objection 1: It would seem that heavenly bodies can act on the demons.
For the demons, according to certain phases of the moon, can harass
men, who on that account are called lunatics, as appears from Matt.
4:24 and 17:14. But this would not be if they were not subject to the
heavenly bodies. Therefore the demons are subject to them.

Obj. 2: Further, necromancers observe certain constellations in order
to invoke the demons. But these would not be invoked through the
heavenly bodies unless they were subject to them. Therefore the