When Moses led the Israelites out of Egypt, I'm sure several million people were wondering, "How am I going to be fed? How am I going to survive in this wilderness?"
Imagine the logistical nightmare. An incalculable quantity of food and water were needed to survive in the desert. Where would it come from?
Yet, in this seemingly impossible situation, God provided!
He provided Manna from heaven. When the people first saw the Manna on the ground, they wondered in amazement saying to each other, "What is this?", which is exactly what "Manna" means in Hebrew: "What is it?"
They were receiving the food of angels (Psalm 78:24-25) which sustained them the entire time in the desert.
But we know what happened as time passed.
The people got used to this miraculous provision, began to take it for granted, and even be bored...