On the Mysteries (De Mysteriis)

possesses it by nature itself, being very much superior to bodies.
Daemons and heroes are impassible.

Daemons and heroes are impassible and eternal. For they always follow the gods in preserving the order of the world; but where there is passion, perpetual order is not preserved.
Porphyry’s opinion on daemons.

Porphyry suspected that daemons, the rulers of the world, were in some way passible through those things which are applied to them in sacred rites. Iamblichus denies this, because where there is perpetual order, there is no passion, which an incorporeal essence cannot receive among eternal things. But perhaps he would concede that the lowest and evil daemons, deprived of governance, are touched by effective passions—not indeed in the soul, but in such a body as is constituted by the presence of the soul.
The office of the Priest.

Just as nature makes manifest things from hidden reasons, so the Priest employs manifest things to signify hidden ones. The Priest often performs many things by which he may effect something similar and proper to divine things, by which kinship he may attract something from the divine. Meanwhile, he also performs many things through which he may purify the soul and avert evils from us.
Daemons receive nothing from us.

Daemons, who are superior to us, receive no natural benefit from us; for either they do not lack, or they themselves abundantly provide for themselves everywhere. Indeed, they never suffer any change from corporeal things. There are in us certain principles of disturbances,