Synopsis: Pentecostalism is one of the largest and fastest growing religious movements around the world. Yet, the movement's defining doctrine has met with controversy and criticism since its inception. Classical Pentecostals have not only affirmed and valued the experience of speaking in other tongues, they have argued that such an experience is the first evidence of a Christian having reached a level of spiritual empowerment they call Baptism in the Holy Spirit. That speaking in an unknown language should be considered by many Pentecostals to be a normative and uniform right of passage for...