Jerome : (Verse 2) The deserted cities will be for flocks, and they will rest there, and there will be no one to frighten them away. The deserted cities, Aroer, that is, Myrhae, will be for the Ecclesiastical flocks, so that we may inhabit those which the Jews deserted: whether the destroyed idolatry will be rebuilt as the Gospel. And we see that this has been fulfilled in our times: the Serapeum in Alexandria and the temple of Marnas in Gaza have arisen as churches of the Lord, and the cities of Aroer have been prepared for the Evangelical flocks. Aroer, that is, myrice, grows in desert places, according to what is written in the curse of the man who trusts in man and departs from the Lord: He shall be like a myrtle in the desert and shall not see when good comes; but he shall dwell in dryness, in the desert, in a land of saltness and uninhabitable. So those who were once in the desert of the Gentiles, and hated the name of Christians, will serve the flocks of Christ, who will find rest in them, and there will be no one to frighten them, for the Lord will dwell among them, and with the Shepherd present, they will not be able to fear the wolf. — Commentary on Isaiah