Tatian the Assyrian — on 1Cor 2:14 (Address of Tatian to the Greeks, Chapter XV)

“The perfect God is without flesh; but man is flesh. The bond of the flesh is the soul; that which encloses the soul is the flesh. Such is the nature of man's constitution; and, if it be like a temple, God is pleased to dwell in it by the spirit, His representative; but, if it be not such a habitation, man excels the wild beasts in articulate language only,—in other respects his manner of life is like theirs, as one who is not a likeness of God. But none of the demons possess flesh; their structure is spiritual, like that of fire or air. And only by those whom the Spirit of God dwells in and fortifies are the bodies of the demons easily seen, not at all by others,—I mean those who possess only soul; for the inferior has not the ability to apprehend the superior.”