But in the last days it shall come to pass, that the mountain of the house of the LORD shall be established on the top of the mountains, and it shall be exalted above the hills; and people shall flow unto it.
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Augustine of Hippo
The prophet Micah employed the symbol of a high mountain to speak of the gathering of the nations in Christ. He has this to say: “And it shall come to pass in the last days that the mountain of the house of the Lord shall be prepared in the top of the mountains and high above the hills; and people shall flow to it. And many nations shall come in haste, and say, ‘Come, let us go up to the mountain of the Lord, and to the house of the God of Jacob; and he will teach us of his ways, and we will walk in his paths; for the law shall go forth out of Zion, and the word of the Lord out of Jerusalem. And he shall judge among many people and rebuke strong nations afar off.’ ” Further, the same prophet foretold even the place in which Christ was to be born: “But you, O Bethlehem Eph’rathah, who are little among the clans of Judah, from you shall come forth for me one who is to be ruler in Israel, whose origin is from old, from ancient days.”
Last days. This sometimes means after this, Isaias ix. 1. But here it denotes the time which shall elapse from Christ till the day of eternity. The Jews allow that this prediction regards the Messias, though they will not explain it of Jesus Christ. Their exceptions are well refuted by Ribera. (Worthington)
It is plain that it can be verified nowhere else, but in the Church of Christ; though some expressions may, as usual, refer to the return of the captives. Isaias, (ii. 2.), had already used the like terms under Ozias. Juda is here comforted, after its ruin had been denounced.
When the prophetic Spirit speaks as prophesying things to come, he says, “For the law will go forth from Zion, and the word of the Lord from Jerusalem, and he shall judge in the midst of the nations and rebuke many people. And they shall beat their swords into plowshares and their spears into pruning hooks, and nation will not lift up sword against nation, neither shall they learn to war anymore.” We can show you that this has really happened. For a band of twelve men went forth from Jerusalem, and they were common men, not trained in speaking. But by the power of God they testified to every race of humankind that they were sent by Christ to teach to all the Word of God. And now we who once killed each other not only do not make war on each other, but in order not to lie or deceive our inquisitors we gladly die for the confession of Christ. For it would be possible for us to follow the saying, “The tongue has sworn, the mind remains unsworn.” But it would be ridiculous if the soldiers ...
For Micah announced that the new law would be given in this way: “The law shall go forth out of Zion, and the word of the Lord out of Jerusalem. And he shall judge among many people, and he shall vanquish and rebuke nations.” For that prior law that was given through Moses was given not on Mount Zion but on Mount Horeb. And the Sibyl showed that this would be destroyed by the Son of God. “But when all these things have been fulfilled which he spoke, at that time then the whole law is destroyed.”