In just over a century, Pentecostalism has rocketed from its humble beginnings in an interracial congregation on Azusa Street in Los Angeles to a global movement counting more than six hundred million members. Confronted with the bewildering array of Pentecostal, Charismatic, and Neocharismatic beliefs and practices, Lutherans are often at a loss as to how to think about Pentecostals, much less how to engage them in positive ways that build up the...