25 We do not wonder then, that Moses and the prophets, whom the Angelic Doctor rightly names the "elders" of the chosen people,(19) perceived clearly that the foundation of the whole Law lay on this commandment of love, and described all the circumstances and relationships which should exist between God and His people by metaphors drawn from the natural love of a father and his children, or a man and his wife, rather than from the harsh imagery derived from the supreme dominion of God or the obligation of subjecting ourselves in fear. And so, to take an example, when Moses himself was singing his famous hymn in honor of the people restored to freedom from the slavery of Egypt, and wished to indicate it had come about by the power of God; he used these symbolic and touching expressions: "As the eagle enticing her young to fly, and hovering over them, (God) spread his wings, and hath taken him (Israel) and carried him on his shoulders."(20)
Source: Haurietis Aquas (Vatican.va)