The most excellent authority of Augustine On the Origin of the Soul

I say concerning my soul, I do not know how it came into my body; for I did not bestow it upon myself. He knows who bestowed it, whether He drew it from my father or whether He created a new one for the first man. I shall know if He Himself teaches me whatever He wills. But now I do not know, nor am I ashamed to confess that I do not know what I do not know. We do not defend those who maintain that souls are blown into the body from elsewhere original: "hinc apagine insufflacor"; indeed, we do not profess this. But from those who are able to find something, either in the canonical books which is not ambiguous for solving this most difficult question, or in the reasonings of this which is not contrary to catholic truth, I receive [it] with gratitude.

Augustine On the Divination of Demons

The nature of demons is such that they are sharp in body and sense, and they easily grasp the sense of the earthly body. Also, by the speed of their body—as the superior mobility of that same airy body—they exceed not only the running of any men or beasts, but even the flight of birds in an inexplicable way. By these two things, which pertain greatly to the airy body—that is, the sharpness of sense and the speed of movement—they announce or predict many things beforehand, which men marvel at because of the slowness of the earthly sense. There is also added to the demons, through such a long time in which their life extends, a far greater experience of things than can come to men because of the brevity of their life. Through these efficacies, which are associated with their airy body, demons not only predict things that are going to happen, but they also perform wonderful things. It must be known that demons announce those things which they themselves are going to do.