The author distinguished his book through thorough investigation, leaving no topic—major or minor—of rhetoric unaddressed. He presented each issue in a detailed and precise manner, encompassing all opinions related to it, whether from his own time or from earlier periods. Jalāl al-Dīn al-Qazwīnī said in the book's introduction: “This is a book on the science of rhetoric and its related subjects. I have named it
al-Idāḥ (The Elucidation) and arranged it according to the structure of my abridgment, which I titled
Talkhīṣ al-Miftāḥ (The Summary of the Key). I have elaborated upon it to serve as a commentary for that work: clarifying its difficult parts, explaining its concise meanings, and adding material omitted from the abridgment that is found in
Miftāḥ al-ʿUlūm (The Key to the Sciences). I have also included what
al-Miftāḥ left out from the writings of the great Imam
'Abd al-Qāhir al-Jurjānī (may Allah have mercy on him), in his books
Dalāʾil al-Iʿjāz (Proofs of Inimitability) and
Asrār al-Balāgha (Secrets of Eloquence), along with whatever else I could examine from the words of others. I extracted the essence of all this, refined and organized it until everything was placed in its proper place. I also added my own insights—what my mind arrived at and I did not find in the works of others. Thanks to Allah, the result is a comprehensive work that gathers together the scattered elements of this science. I sincerely hope it benefits those with understanding who read it. Allah is sufficient for me, and He is the best disposer of affairs.” The text combines exposition with critique, functioning not just as a commentary but as an independent contribution to rhetorical theory. It was often used in tandem with the Talkhīṣ, allowing students to balance memorization with detailed understanding. ==Editions==