Certainly, that exaltation of the son of Nun took place in order that the leader of those former people might be held eminent among those whom he ruled. But let us see how our Jesus my Lord, leader and ruler of this latter people, is "exalted" in the sight of all the descendants of the sons of Israel. I myself think that he was always exalted and elevated in the presence of the Father. But it is necessary that God exalt him in our sight. He is exalted in my sight when the sublimity and loftiness of his divinity is disclosed to me. When, therefore, is his lofty divinity revealed to me? At that time, assuredly, when I crossed over the Jordan and was equipped with the various defenses of the sacraments for the future battle.
Source: HOMILIES ON JOSHUA 5.3