6:7, 8 According to the prophetic imagery of the Old Testament, the ground is God’s people (Is. 5:1–7), and the rain falling on it is the Word (Is. 55:10, 11) or the Spirit of God (Is. 44:3, 4). The unproductive field is destroyed (Is. 5:4–6). See also Matt. 13:7, 8, 22, 23.