Now is the time for Jerusalem to rejoice. Mourning the fate of Israel and Judah has been a Jewish preoccupation for a long time. Ever since Assyria came down and took the northern territory captive, the people have been grief-stricken. But now that God has announced the good news, mourning is no longer appropriate; it indicates a lack of faith in His plans. After enduring so many years of grief and desolation, can God’s covenant people now turn and trust Him to deliver this baby overnight? Trust and joy belong together. Zion is like a fertile young woman; she will have all the children that God wills and she desires. Be happy, the prophet says, and let the celebrations begin.