Beda Venerabilis
Jeremiah references this gate, noting its location on the eastern side of the city, as he symbolically describes the Church with the words: "The city shall be laid up for the glory of the Lord from the tower of Anameel unto the coal gate" (Jeremiah 31:38). He continues, "To the stream of Kedron, to the corner of the horse gate eastward" (Jeremiah 31:40). In this context, horses, when engaged in righteous labor like donkeys, camels, and mules, may represent the nations of the Gentiles who have turned to the Lord. Alternatively, they can symbolize the burdens of worldly concerns that dominate and control the soul. Thus, the priests constructed the wall of God's city up to the Horse Gate, reflecting the response of the Jewish people as holy leaders guided the Gentiles into the sacred Church.
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Likewise, they raise the structure toward the Horse Gate by providing living examples to those entering the holy Church, aiming to temper the fleshly desires and safeguard the soul; or perhaps, they manage their thoughts regarding essential needs like food and clothing for themselves and their families (cf. Matt. 6:31) in a way that does not hinder their quest for spiritual elevation.