Salam
There is another feature of Quran which payed attention to is pretty awesome. It's the way chronologically the Surahs expand on one another or summarize one another.
This feature can be seen for example in the first Chapter (Al-Fatiha), we pray for guidance, and then it emphasizes that this book there is no doubt in it a guidance to those who guard (against God's wrath). The very writing itself of that chapter also emphasizes on the chosen leaders such as Adam, Abraham, Talut, the branches of Abraham such as Joseph (peace be upon them all), and talks about in detail what bani-Israel did with the guidance they were given in form of scriptures as well divinely appointed kings among them.
On the way to verse 2:255 which is the peak of Quran, it talks about the story of Talut (a) who was poor but had immense knowledge from God and was given authority from God. It than emphasizes that authority is in the family of Moses and family of Aaron (peace be upon them all), and with the singular tarak (left behind) it's understood the household of Moses is the household of Aaron per Quran and authority is given to that holy family. It also tells of the bravery of the followers of Talut (a) who when outnumbered were able to vanquish their enemies. This leads perfectly into the next Surah. The next Surah is basically an expansion of that but relates it to Mohammad (s).
Some brief display of this, is that the family of Imran is emphasized on, and that's also the same family of Musa and Aaron. It talks about the believers and the help they received from Angels in battle when outnumbered.
And going back to the "he gives his authority to who he pleases" in the previous chapter, we find it relates to Mohammad (s) "O my God Master of the Authority, you give the authority to who you please and negate the authority from who you please, and honor who you please and disgrace who you please, in your hands is the good, indeed you have power over all things".
This relationship of one chapter to another is amazing feature of Quran. The emphasis on the family of Abraham alongside family of Imran, is also a leading on to the next chapter. This was emphasized with obeying God and the Messenger and following Mohammad (s) if we love God.
It also in a way shows how God answered the prayers at the end of Surah 2, with respect to the companions of Mohammad (s).
In the 4th Chapter, the allusion to Family of Ibrahim (a) is highly important as it talks about the household of Abraham's authority and the grace of God upon them to give context to the Ulil-Amr (possessors of the Authority) from us. The "from you" is obvious by the talk that similarly we been given a family that holds authority like the family of Abraham had the authority and the grace of God regarding the families chosen for guiding humanity is immense.
Now what is amazing is how this all goes back to the first chapter and introduction. The Quran said "guide us the straight bridge" but doesn't stop there, and says "The path of those who you favored (humanity) regarding them..." while these words can be seen in many ways, in flow of 4:59 it finally concludes "And whoever obeys God and the Messenger so these are with those who he has favored (humanity) regarding them from the Prophets and Veracious and Witnesses and Righteous and beautiful/good are these as company!".
The Quran always talks about those who God has favored (humanity) regarding to be the chosen ones, and you will see this emphasis through out Quran. Of course, there is sometimes where it talks about who God favored with wealth and also who God favored in general in case of Zaid and who Mohammad (S) also favored (Zaid), but most of the places it emphasizes on the chosen:
أُولَٰئِكَ الَّذِينَ أَنْعَمَ اللَّهُ عَلَيْهِمْ مِنَ النَّبِيِّينَ مِنْ ذُرِّيَّةِ آدَمَ وَمِمَّنْ حَمَلْنَا مَعَ نُوحٍ وَمِنْ ذُرِّيَّةِ إِبْرَاهِيمَ وَإِسْرَائِيلَ وَمِمَّنْ هَدَيْنَا وَاجْتَبَيْنَا ۚ إِذَا تُتْلَىٰ عَلَيْهِمْ آيَاتُ الرَّحْمَٰنِ خَرُّوا سُجَّدًا وَبُكِيًّا
These are they who God has favored (humanity) regarding them from the prophets of Adam’s progeny, and from [the progeny of] those We carried with Noah, and from among the progeny of Abraham and Israel, and from among those that We guided and chose. When the signs of the All-beneficent were recited to them, they would fall down weeping in prostration.
And this way Quran explains itself and explains the first chapter, is an amazing feature it has.
Regarding Isa (a) it also says is but a servant who God has favored (humanity) regarding and was made an example to Bani-Israel but else where talked about him being a word preceding from God and a spirit from him so we can see being servant who God favors humanity regarding is no small feet!
The chapter 5 also then flows with the previous 4 chapters. And I will discuss this is the next post inshallah.