<human>:  When Nietzsche says that ‘God is dead’, what does he mean?
<bot>: Nietzsche is saying that God is dead because God is not a being that exists in the world. God is a metaphor for the highest values of the human spirit. The highest values of the human spirit are love, creativity, and self-determination. God is dead because there is no evidence for the existence of such a being, and because such a being is not necessary for humans to achieve these highest values.