On the contrary, Augustine says (De Trin. iii, 8,9) that the angels use corporeal seed to produce certain effects. But they cannot do this without causing local movement. Therefore bodies obey them in local motion.
I answer that, As Dionysius says (Div. Nom. vii): "Divine wisdom has joined the ends of the first to the principles of the second." Hence it is clear that the inferior nature at its highest point is in conjunction with superior nature. Now corporeal nature is below the spiritual nature. But among all corporeal movements the most perfect is local motion, as the Philosopher proves (Phys. viii, 7). The reason of this is that what is moved locally is not as such in potentiality to anything intrinsic, but only to something extrinsic—that is, to place. Therefore the corporeal nature has a natural aptitude to be moved immediately by the spiritual nature as regards place. Hence also the philosophers asserted that the supreme bodies are moved locally by the spiritual substances; whence we see that the soul moves the body first and chiefly by a local motion.
Reply Obj. 1: There are in bodies other local movements besides those which result from the forms; for instance, the ebb and flow of the sea does not follow from the substantial form of the water, but from the influence of the moon; and much more can local movements result from the power of spiritual substances.
Reply Obj. 2: The angels, by causing local motion, as the first motion, can thereby cause other movements; that is, by employing corporeal agents to produce these effects, as a workman employs fire to soften iron.
Reply Obj. 3: The power of an angel is not so limited as is the power of the soul. Hence the motive power of the soul is limited to the body united to it, which is vivified by it, and by which it can move other things. But an angel's power is not limited to any body; hence it can move locally bodies not joined to it. _______________________
FOURTH ARTICLE [I, Q. 110, Art. 4]
Whether Angels Can Work Miracles?
Objection 1: It would seem that the angels can work miracles. For Gregory says (Hom. xxxiv in Evang.): "Those spirits are called virtues by whom signs and miracles are usually done."
Obj. 2: Further, Augustine says (QQ. 83, qu. 79) that "magicians work miracles by private contracts; good Christians by public justice, bad Christians by the signs of public justice." But magicians work miracles because they are "heard by the demons," as he says elsewhere in the same work [*Cf. Liber xxi, Sentent., sent. 4: among the supposititious works of St. Augustine]. Therefore the demons can work miracles. Therefore much more can the good angels.
Obj. 3: Further, Augustine says in the same work [*Cf. Liber xxi, Sentent., sent. 4: among the supposititious works of St. Augustine] that "it is not absurd to believe that all the things we see happen may be brought about by the lower powers that dwell in our atmosphere." But when an effect of natural causes is produced outside the order of the natural cause, we call it a miracle, as, for instance, when anyone is cured of a fever without the operation of nature. Therefore the angels and demons can work miracles.