This final volume serves as a comprehensive wrap-up for the series, which has thoroughly explored Greek, Latin, Hebrew, Aramaic, English, and German texts on the history and development of the Christian doctrine of tongues from inception until the beginning of the twentieth century. This volume contains a commentary on 1 Corinthians 14 based on the findings presented in this series. It also contains further insights into the rise to dominance of the glossolalia theory, as well as the changes in the Pentecostal understanding of speaking in tongues. This finale provides a summary of the findings across all the volumes and their profound impact on the contemporary Christian religious landscape, shaping this understanding of the doctrine of tongues.