Disputation was the proper field of Bishop Sāwīrus. While he jokingly contended Muslims and Jews alike, in his History of the Councils he spoke in a serious tone, presenting an apology of the Nicene-Constantinopolitan creed as exposed by the Council theologians against the past heresies, which he saw coming alive among his Christian contemporaries.
Sāwīrus' idiom abounds in expressions that are typical for the language of Qur'ān and the Sunna and has interesting counterparts in contemporary Islamic akidas.