As Haggai encouraged the returned Jewish exiles to rebuild the temple, Zechariah encouraged them to repent and renew their covenant with God. Such spiritual renewal would be necessary for the people to be ready to worship God once the temple was rebuilt (about 516 b.c.). He accused them of doing the very things their ancestors had done before the exile. He was concerned about social justice for widows, orphans, and foreigners. But as the people endured opposition from the non-Jewish inhabitants of Judea, Zechariah reassured them of God's abiding comfort and care. God would continue his covenant with Israel. Messianic hope was rekindled during Zechariah's ministry, and the book ends with the promise that the Lord would establish his rule over all the earth (14:9).