Augustine of Hippo
The Ethiopians represent all nations, specifically highlighting that people located at the ends of the earth. When it is stated that "in His presence they shall fall," it indicates that they will worship Him. There will inevitably be divisions across various regions of the world, which may envy the expansion of the universal Church. These divisions arise in the names of men and beloved figures under whom they are separated, thereby opposing the glory of Christ that prevails in all lands. When it is noted that the Ethiopians will bow before Him, it is also mentioned that His adversaries would "lick the dust," signifying their affection for men and their jealousy of Christ's glory.
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The proclamation, "Be exalted above the heavens, O God, and let Your glory be above all the earth," points to the human condition deserving the declaration, "For dust you are, and to dust you shall return" (Gen. 3:19). By "licking the dust," which symbolizes a pursuit of the fleeting power held by such individuals, they demonstrate their love and admiration for them. In doing so, they disregard the divine prophecies that foretold the emergence of the Church, which is destined not for a specific locale, as observed in some divisions, but for the entirety of creation, bearing fruit and maturing to include even those who are the furthest removed, the most despised among humanity.