The phrase “a land flowing with milk and honey” is certainly metaphorical. Moses doesn’t mean that the rivers and streams of the promised land literally flow with milk and honey rather than with water. But he does want the people to have such a picture in their minds. He wants them to know they will be leaving behind the nomadic, foraging existence they have known in the wilderness. They will settle in a new land where their cattle will be well fed and will be able to provide them with milk in abundance. They will have the freedom to pursue even more discretionary activities since date honey would seep out of the trees without needing cultivating. God’s promise isn’t just that they will possess the land but that they will find rest, abundance, and health in it.