Ether prophesied of the millennial day when old Jerusalem also will become again a holy city, inhabited by Jews who have not only been gathered to their promised land from the four quarters of the earth but also have accepted Jesus and his only true, and living church and have been cleansed by faith in the Atonement and faithfulness to gospel ordinances and commandments. The temple will play a significant role in creating a sanctified and holy people and thereby making Jerusalem a holy city (see Millennial Messiah, pp. 278-81).
“Jerusalem shall rise again,” wrote Elder Bruce R. McConkie. “As she fell from grace because she forsook the living God, so shall she rise again when she once more worships her Eternal King in the beauty of holiness. As she fell because of iniquity, so shall she be restored through righteousness. When the Jews receive the fulness of the everlasting gospel as it has been restored through the Prophet Joseph Smith, they will return to Jerusalem as the Lord’s true legal administrators to built up Jerusalem as a Zion and to place again on the ancient site the temple of the new kingdom. And then when the Lord comes, the ancient city will shine forth with a glory and a splendor never before known among mortals.” (Millennial Messiah, p. 300; see also Zechariah 8:1-23.)