This is a scholarly anthology excerpt combining historical framing with a translated primary source from 11th-century Islamic intellectual history. The historical portion traces how the Saljūq Turks rose to power within the ʿAbbāsī Caliphate, and how their Persian minister Niẓām al-Mulk strategically patronized Ashʿarī theology — including founding the Niẓāmīya madrasa for the theologian al-Juwaynī — as a weapon in the ideological battle against Ismāʿīlī Shīʿa influence. The primary source itself is a section from al-Juwaynī's creed (al-ʿAqīda al-Niẓāmīya, c. 1085) defending the rational necessity of prophethood against a Brahman critique: the Brahmans argue that prophets are redundant if they teach what reason already knows, or irrational if they teach what reason rejects. Al-Juwaynī's reply is that prophets legitimately bring both — confirming reason while also delivering divine commands (ritual law, eschatological promises) that reason could not arrive at independently. On the objection that certain ritual commands (animal sacrifice, prostration in prayer) are morally hideous, al-Juwaynī replies with a divine command theory: God acts freely and is not subject to human moral evaluation, so what God does or commands cannot be deemed "hideous" by human rational standards. The text is distinctive for illustrating how high-level Islamic political patronage directly shaped scholastic theology, and for preserving a sharp interfaith polemic in a classical kalām format.