Commentary on John, §18, ANF, v. 10; Treasures of the Fathers, v. 3.

Now Jesus is the Word of God which goes into the soul that is called Jerusalem, riding on the donkey freed by the disciples from its bonds. That is to say, on the simple language of the Old Testament, interpreted by the two disciples who loose it: in the first place him who applies what is written to the service of the soul and shows the allegorical sense of it with reference to her, and in the second place him who brings to light by the things which lie in shadow the good and true things of the future.