What does Deuteronomy 8:3 mean?

He humbled you, letting you go hungry, and then fed you with manna—something you and your ancestors had never seen—so you'd learn that people don't live just on bread, but on every word that comes from the Lord. Deuteronomy 8:3 - Modern Text Bible

(God used hunger and miraculous provision to teach them dependence on Him, not just on physical food.)