This is a manifest allegory, because he here takes as the younger, not him who was so in age and in point of time, but him who was younger in mind; since wickedness is unable to attain to a perception of the learning which is proper to the elder; but the elder thoughts belong to a will which is truly growing old, not indeed in body, but in mind.
Why did Noah when praying for Shem speak thus: "Blessed is the Lord God, the God of Shem: and Canaan shall be his servant?" (Genesis 9:23).