The difference between the true God and the gods of the nations is that the true God carries and the other gods must be carried. God serves, they must be served. God glorifies His might by showing mercy. They glorify theirs by gathering slaves. So the vision of God as one whose passion for His glory moves Him to mercy impels missions because He is utterly unique among all the gods.
—John Piper, Let the Nations Be Glad: The Supremacy of God in Missions, 56
“For all the gods of the peoples are worthless idols, but the LORD made the heavens.” (Psalm 96:5)