Summary

Portrait of Thomas Aquinas Thomas Aquinas Summa Theologiae — Question 110 - HOW ANGELS ACT ON BODIES…

Properly speaking, as said above, miracles are those things which are done outside the order of the whole created nature. But as we do not know all the power of created nature, it follows that when anything is done outside the order of created nature by a power unknown to us, it is called a miracle as regards ourselves. So when the demons do anything of their own natural power, these things are called "miracles" not in an absolute sense, but in reference to ourselves. In this way the magicians work miracles through the demons
Source: Wikisource

Portrait of Thomas Aquinas Thomas Aquinas Summa Theologiae — Question 110 - HOW ANGELS ACT ON BODIES…

Now it is manifest that the power of any individual body is more particular than the power of any spiritual substance; for every corporeal form is a form individualized by matter, and determined to the "here and now"; whereas immaterial forms are absolute and intelligible. Therefore, as the inferior angels who have the less universal forms, are ruled by the superior; so are all corporeal things ruled by the angels.
Source: Wikisource

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