In this review article of Craig Keener's Spirit Hermeneutics: Reading Scripture in the Light of Pentecost, Ben Aker, who is Keener's former professor, raises fundamental theological questions that lie beneath the legitimacy of the Classical Pentecostal reading of Acts 2, suggesting that the Spirit is equally active in the process of salvation and in the empowerment for mission. Although Keener is commended for his attention to contextualization, the article questions whether a more practical theology is not still needed.