This is a scholarly excerpt on medieval Islamic theology, drawn from translated primary sources (al-Ash'arī's *Kitāb al-Ibāna* and *Kitāb al-Luma'*) framed by historical commentary, situating al-Ash'arī (d. 935 CE) as the founder of a theological school that sought a middle path between Mu'tazilī rationalism and Ḥanbalī literalism. The central argument is that al-Ash'arī, a former Mu'tazilī who broke with his teacher over the irreconcilability of that school's doctrines with prophetic tradition, developed kalām (dialectic theology) to defend traditional Sunnī beliefs — such as the uncreated Qur'ān, God's eternal attributes, and divine determinism — using the very logical methods his opponents employed. The text extensively catalogs Mu'tazilī positions that al-Ash'arī condemned: denial of God's literal attributes (face, hands, eyes), assertion that humans create their own acts, and the claim that the Qur'ān is created — each framed as dangerous innovation approximating Magianism or polytheism. A notably distinctive doctrinal claim, presented in direct question-and-answer form, is al-Ash'arī's voluntarist position that God is absolutely unconstrained — free to torture innocents, punish believers, or reward unbelievers — and that nothing can be morally evil on God's part because evil only arises from transgressing limits, and God is subject to none. The historical framing notes that Ash'arism ultimately triumphed with Seljuq patronage, the Mu'tazila were suppressed and their books burned, though their ideas survived within Shī'ī theology. Readers interested in Islamic scholasticism, the formation of Sunnī orthodoxy, or debates over divine determinism versus human agency will find this a densely substantive introduction to the theological stakes involved.