This article discusses Neo-Pentecostalism. It considers its history, traced all the way back to the second century and the appearance of Gnosticism and Montanism, yet becoming more official on account of John Wesley. The author explains its teachings and where they deviate from the full gospel revealed in Scripture. Among other things, he considers the matters of baptism with the Holy Spirit and speaking in tongues. Finally, he offers some counsel as to how to meet the challenge of Neo-Pentecostalism.