طَاوِيًا كَشْحَ الْمَقَالِ عَنِ الْإِطَالَةِ وَالْإِمْلَالِ، وَمُتَجَافِيًا عَنْ طَرَفَيِ الِاقْتِصَادِ الْإِطْنَابِ وَالْإِخْلَالِ
Avoiding needless length and weariness, and steering clear of the two extremes: excess and omission.
Iṭālah and iṭnāb here concern unnecessary expansion; ikhlāl is the omission of a necessary point, qualification or proof. Not all detail is harmful: difficult questions may require extensive explanation. What fails is detail that does not improve understanding.
Thus a scholarly explanation should be neither a cluster of incomplete slogans nor an aimless, exhausting digression. The ideal is economy without sacrificing investigation.
وَاللَّهُ الْهَادِي إِلَى سَبِيلِ الرَّشَادِ ... وَهُوَ حَسْبِي وَنِعْمَ الْوَكِيلُ
Allah guides to the sound path; He is sufficient for me and the best disposer of affairs.
Seeking divine guidance after carrying out the work of disciplined inquiry is the ethical conclusion of this introductory method.