Chris Arnade has a Ph.D. in physics. He worked on Wall Street for 20 years. He counted himself among the atheists who enjoy nothing more than poking holes in the Bible and making fun of Christians. Richard Dawkins was his hero. He quit his Wall Street job to photograph homeless people in the Bronx. The homeless people he met, including the addicts and prostitutes, undermined his atheism. For many of them, faith was what got them through life. “I’ve been reminded that life is not as rational as Richard Dawkins sees it. Perhaps atheism is an intellectual luxury for the wealthy,” said Arnade (Guardian, December 24).