Pseudo-Chrysostom
Catena Aurea · Markusevangelium 1
And there was in their synagogue a man with an unclean spirit; and he cried out, Saying, Let us alone; what have we to do with thee, thou Jesus of Nazareth? art thou come to destroy us? I know thee who thou art, the Holy One of God. And Jesus rebuked him, saying, Hold thy peace, and come out of him. And when the unclean spirit had torn him, and cried with a loud voice, he came out of him. And they were all amazed, insomuch that they questioned among themselves, saying, What thing is this? what new doctrine is this? for with authority commandeth he even the unclean spirits, and they do obey him. And immediately his fame spread abroad throughout all the region round about Galilee.
(Vict. Ant. e Cat. in Marc.) The word Spirit is applied to an Angel, the air, the soul, and even the Holy Ghost. Lest therefore by the sameness of the name we should fall into error, he adds, unclean. And he is called unclean on account of his impiousness and far removal from God, and because he employs himself in all unclean and wicked works.