We understand the man to be God the Father. For similes represent the truth but are not the truth itself. The Creator of the universe and the Father of glory made a great supper, a festival for the whole world, in honor of Christ. In the last times of the world and at our world's setting, the Son rose for us. At this time, He suffered death for our sakes and gave us to eat His flesh, the Bread from heaven that gives life to the world. Toward evening and by the light of torches, the lamb was also sacrificed according to the Law of Moses. With good reason, the invitation that is by Christ is called a supper.
-St. Cyril of Alexandria, Commentary on Luke, Homily 104, Fifth Century


He [Paul] is not speaking only to unbelievers. For there are many believers, no less than unbelievers, who remain still trapped in various sins. There are indeed some who do so all the more. Therefore it was necessary to call these to "awake," etc.
-St. John Chrysostom, Homily on Ephesians 18.5.14, Fourth Century