Alcuin of York — as excerpted in the Catena Aurea on John 1:14

“(in Joan. 1:1.) When we think how the incorporeal soul is joined to the body, so as that of two is made one man, we too shall the more easily receive the notion of the incorporeal Divine substance being joined to the soul in the body, in unity of person; so as that the Word is not turned into flesh, nor the flesh into the Word; just as the soul is not turned into body, nor the body into soul.”