ἐνύπνια οὐκ ἔλαχε φύσιν θείαν οὐδὲ μαντικὴν δύναμιν, ἀλλὰ γίνεται κατὰ ἔμπτωσιν εἰδώλων.
Dreams have neither a divine nature nor a prophetic power; instead they come from the impact of images. (Saint-Andre)
NOTE that the word "images" in the translation, the transcription, and the actual manuscript is the word εἰδώλων, the name of the those film of "images" that impact our senses including our mind.