This reassurance from God is given to a people facing desperate times, which were brought on by God to lead them to repent. Their land lies desolate and decimated from drought, plagues, and poor harvests. God, however, is now promising to bless them if they will return to him with all their hearts. The LORD, the covenant God of Israel, will do great things to bring his people to deliverance through their repentance and his gracious power. The land can rejoice and be glad. So should his people! So should we! Because of Jesus, we know that "the LORD has done great things" for us!