Numbers 11 is a watershed for Israel. When they complained about the manna and said it was better for them in Egypt, they began the slide that would result in a whole generation perishing in the Wilderness. Bread, first mentioned in Genesis 3 is a metaphor for the thing that people eat who are going to die eventually. Bread from heaven then is a metaphor that something better is coming. Y'shua explains this in John 6.
