In the ever-raging battle between faith and science, the neurologist Jay Lombard is one of those rare emissaries who communicate in the language of both camps. In his new book, “The Mind of God,” he uses his experience studying the brain to ask some of the largest philosophical questions: Does God exist? Does life have meaning? Are we free? Lombard writes that he is interested in a “large faith,” rather than a specific religion — “a faith invigorated and enlightened by science rather than being at odds with it.” Below he discusses the debates over brain and mind, his editor's unpromising reaction to an early manuscript, his appreciation for Jerry Garcia and more.