Reading the whole verse of a familiar line: "He humbled you, causing you to hunger and then feeding you with manna; that neither you nor your ancestors had known, to teach you that man does not live on bread alone but on every word that comes from the mouth of the LORD." Deuteronomy 8:3
It makes sense. I have seen God take care of me in unexpected ways, and it is humbling. But he does take care.
Does the whole verse illuminate why Jesus used "man does not live by bread alone but on every word that comes from the mouth of the LORD" when he was tempted? Yes. Satan tempts Jesus: You're hungry, make bread. That would be the known solution. Jesus remembers that the Father often has an unexpected solution.