When they crossed into the desert, they would not have kept telling Moses that they wanted to go back to Egypt where they had plenty to eat if they expected God to feed them. Somehow they imagined that God would miraculously deliver them from Egypt and then leave them to die in the desert.
Do you think the apostles expected Jesus to feed 5,000 people with a few loaves of bread and some fish? No, they wanted to send the people into the town to buy food. Even though they knew God had fed their ancestors in the desert, they didn't expect God to feed the people in front of them.
So what about us today? Are we expecting God to work miracles in our lives when we need them? Are we limiting God to working within whatever we can ask or imagine? I know my imagination is not that fertile. I am naturally inclined to be more like the apostles - looking for the obvious answer. But I try not to limit the way God can answer my prayers.
Jesus, help us to keep our minds open, with eyes and ears attunded to the unexpected.