What does Psalm 91:7 mean?
The Bible promises that God is sovereign, and so we can trust Him (Psalm 91:1–2), but that does not mean we are guaranteed absolute invincibility. Jesus, in fact, refuted such interpretations when He rejected Satan's twisted use of this very psalm (Psalm 91:11–12; Matthew 4:5–7).The imagery here may refer not only to disease or natural sickness (Psalm 91:6), but also to battle. In Leviticus 26:8 the Lord promised His covenant people: "Five of you shall chase a hundred, and a hundred of you shall chase ten thousand, and your enemies shall fall before you by the sword." In the times of the Judges, the Lord used Gideon and his 300 men to defeat the Midianites, the Amalekites, and all the people of the East. Judges 7:12 describes this enemy as lying "along the valley like locusts in abundance, and their camels were without number, as the sand that is on the seashore in abundance."
Earlier in Israel's history the Lord intervened at the Red Sea to save His people from the Egyptian cavalry. He caused the pillar of cloud to come between the Israelites and the Egyptians to protect Israelites. He also provided a safe path through the Red Sea for His people but brought the waters together again when the Egyptians pursued the Israelites. As a result, the cavalry drowned in the sea (Exodus 14). When God chooses to intervene on behalf of His people, nothing can stand in the way.
