-->
At this point in his commentary, Razi draws the reader's attention to 42:52 "thou didst not know what revelation is, nor what faith [implies]": a passage similar in purport to the closing words of the above verse: hence my addition, between brackets, of the phrase "of what revelation is".
Or: "By Our having revealed".
Lit., "with the best explanation (ahsan al-iqtisas)". This rendering is very close to the interpretation given by Zamakhshari: "We set forth this Qur'an unto thee in the best way in which it could be set forth." According to Razi, it may safely be assumed that the adjective "best" refers not to the contents of "that which is set forth" - i.e., the particular story narrated in this surah - but rather to the manner in which the Qur'an (or this particular surah) is set forth: and herein he agrees with Zamakhshari. It should be borne in mind that the verb qassa (the infinitive nouns of which are qasas and iqtisas) signifies, primarily, "he followed step by step" or "by degrees", and, subsequently, "he related [a piece of news or a story] as though he followed its traces": hence, "he expounded [it] gradually" or "he explained [it]" (cf. Lane VII, 2526, quoting the Qamus and the Taj al-'Arus with specific reference to the above verse). If, on the other hand, the infinitive noun qasas is regarded as synonymous, in this context, with qissah ("story" or "narrative"), the above sentence might be rendered as "We narrate unto thee the best of narratives", i.e., the subsequent story of Joseph. In my opinion, however, the rendering "We explain it [i.e., the Qur'an] in the best possible way" is preferable inasmuch as it fully coincides with the two opening verses of this surah, which state, in effect, that the Qur'an is self-explanatory.
Most beautiful of stories: see Introduction to this Sura. Eloquence consists in conveying by a word or hint many meanings for those who can understand and wish to learn wisdom. Not only is Joseph's story "beautiful" in that sense, Joseph himself was renowned for manly beauty; the women of Egypt, called him a noble angel (xii. 31), and the beauty of his exterior form was a symbol of the beauty of his soul.