How did Adam Kirsch address the broader audience, including Christians, in relation to the spiritual aspects of the books themes?
Kirsch mentioned that Christians also recognize the issues discussed in the book as fundamentally spiritual, focusing on questions about the purpose of humanity.
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### Instruction:
How did Adam Kirsch address the broader audience, including Christians, in relation to the spiritual aspects of the books themes?

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### Response:
Kirsch mentioned that Christians also recognize the issues discussed in the book as fundamentally spiritual, focusing on questions about the purpose of humanity.<|im_end|>