What does Psalm 66:9 mean?
The psalmist credits God with preserving His chosen people (Deuteronomy 14:2). Despite harsh conditions and hostile enemies, He protected Israel during the wilderness wanderings (Psalm 105:40–42). At times He supernaturally intervened in attacks made against them. An example of this is when the massive Assyrian army laid siege to Jerusalem. God answered that threat by slaying tens of thousands of enemy soldiers (Isaiah 36—37). Despite their troubles, God has preserved His people through the centuries.He will also protect them during the coming tribulation. Revelation 12 describes some of this end-times persecution; saved Jewish persons will receive a safe hiding place (Revelation 12:13–14). God can be trusted to protect and preserve His people! Jude 1:24 promises that He is able to keep believers from falling and escort them safely into "the presence of his glory with great joy."
Psalm 66:1–9 opens with a call to praise extended to the entire world. The psalmist declares God's awesome might. He reflects on the Lord's incredible acts of power. Among these are His provision for Israel's safe passage through the Red Sea (Exodus 14:21–22). God is watching the whole earth; no one should arrogantly think they can defy Him. God's people should be particularly worshipful for the ways God has preserved them.
This psalm appeals to the entire world to worship the Lord. His great works, such as giving Israel safe passage through the Red Sea, should be praised. Because God watches the world, no one should presume they can rebel without consequences. God tested Israel heavily but brought the nation to an abundant place. The psalmist declares that he will fulfill his vows and offer sacrifices, because God answered his prayer. Verses 1–9 speak to the nations of earth; verses 10–15 are spoken to God; verses 16–20 are addressed to the congregation.