John Chrysostom

The inspired authors were not like the seers. In their case, after all, when the demon takes possession of their soul, it cripples their mind and clouds their reasoning, and so they utter everything without their mind understanding anything of what is said; rather, it is like a flute sounding without a musician to play a tune. This was said also by a philosopher of theirs in these words, "Just like the soothsayers and seers saying many things without knowing anything of what they say." The Holy Spirit, [by contrast], does not act like that; instead, he allows the heart to know what is said. I mean, if the psalmist did not know, how could he have said "good news"? The demon, you see, being enemy and foe, commits an assault on human nature; the Holy Spirit, by contrast, being caring and beneficent, renders those who receive him sharers in his purposes, and with them understanding him he reveals what he has to tell.