"The term 'atheist,'" Kirsch continued, "should not even exist. No one ever needs to identify himself as a 'nonastrologer' or a 'nonalchemist.' We do not have words for people who doubt that Elvis is still alive, or for people who doubt that aliens traverse the galaxy only to molest cattle. Atheism is nothing more than the noises reasonable people make in the presence of unjustified religious beliefs." A growing number of students clapped their approval. "That definition is not mine, by the way," Kirsch told them. "Those words belong to neuroscientist Sam Harris. And if you have not already done so, you must read his book Letter to a Christian Nation."