During my conversation with Harris, he observed that President Obama had recently ended his public remarks about the beheading of James Foley by the Islamic State in Iraq and Syria, which wraps itself in religion, with a religious invocation: “May God bless and keep Jim’s memory, and may God bless the United States of America.” That struck Harris as odd and yet predictable, because in America, he said, God is the default vocabulary.

“There’s truly no secular or rational alternative for talking about questions of meaning and existential hopes and fears,” he said.

There should be. There’s a hunger for it, suggested by the fact that after Harris recently published the first chapter of “Waking Up” online as a way of announcing the entire volume’s imminent release, readers placed enough preorders for the book that it shot up briefly to No. 22 on Amazon’s list of best sellers.

Some of those buyers, as well as many other Americans, are looking for a different kind of scripture, for prophets purged of doctrine, for guides across the vast landscape between faithlessness and piety, for recognition of this fecund terrain. In a country with freedom of worship, they deserve it.