Cyril of Alexandria
Catena Aurea · Lukasevangelium 9
And it came to pass, that, as they went in the way, a certain man said unto him, Lord, I will follow thee whithersoever thou goest. And Jesus said unto him, Foxes have holes, and birds of the air have nests; but the Son of man hath not where to lay his head. And he said unto another, Follow me. But he said, Lord, suffer me first to go and bury my father. Jesus said unto him, Let the dead bury their dead; but go thou and preach the kingdom of God. And another also said, Lord, I will follow thee; but let me first go bid them farewell, which are at home at my house. And Jesus said unto him, No man, having put his hand to the plough, and looking back, is fit for the kingdom of God. It follows, And Jesus says to him, The foxes have holes, &c.
Now under a mystical signification He applies the name of foxes and birds of the air to the wicked and crafty powers of evil spirits. As if He said, Since foxes and birds of the air have their abode in thee, how shall Christ rest in thee? What fellowship has light with darkness? (2 Cor. 6:14.)