This text marks a beginning: the point at which Muslims start writing down what must be believed, as distinct from what must be done. Islamic scholarship had begun with law, with the transmission of reports and the derivation of rules, and the questions that produce creeds arrived as by-products of political catastrophe rather than of speculation.
Three of them are visible here. Is a Muslim who sins gravely still a Muslim, which the civil wars had made urgent. Does faith increase and decrease, or is it a single assent that a person either has or lacks. And what may be said about the attributes of God that scripture ascribes to him, the hand, the face, the throne, without either denying the words or making God a body. The text answers the first by keeping the sinner inside the community, the second by treating faith as assent and confession, and the third by affirming the attributes while refusing to describe their manner.
That third move, affirming without asking how, becomes the standard Sunni posture and is repeated almost word for word in later creeds including al-Tahawi's. Reading this text beside those later ones shows a tradition working out its vocabulary in public over two centuries, with the same questions recurring because no council ever closed them.