Witness to holiness : Abba Daniel of Scetis : translations of the Greek, Coptic, Ethiopic, Syriac, Armenian, Latin, Old Church Slavonic, and Arabic accounts / edited, with an introduction, by Tim Vivian ; translations by Sebastian P. Brock ... [et al.] ; with the assistance of Apostolos N. Athanassakis, Mark Moussa, and Hany N. Takla