Up to now the teaching on baptism in the Holy Spirit has been based on a few scriptural texts, whose interpretation was disputed. This doubt cast its shadow on those who promote baptism in the Holy Spirit. Now new evidence has been found in early post-biblical authors (Tertullian, Hilary of Poitiers, Cyril of Jerusalem, John Chrysostom, Philoxenus, and the Syrians) which demonstrates that what is called baptism in the Holy Spirit was integral to Christian...