1. That is, the teaching of this Quran is not the production of a man’s mind but its Teacher is the Merciful God Himself. Here, there was no need to tell as to whom Allah had imparted this Quranic teaching for the people were hearing it from the tongue of the Prophet Muhammad (peace be upon him). Therefore, the situation by itself made it evident that the teaching had been imparted to Muhammad (peace be upon him).
To begin the discourse with this sentence is meant, first of all, to tell that the Prophet Muhammad (peace be upon him) himself is not its author, but its Teacher is Allah Almighty. Furthermore, there is another object also to which the word Rahman (Merciful) is pointing.
If the purpose was only to say that that teaching is from Allah, and not the production of the Prophet’s mind, there was no need to use an attribute of Allah instead of His proper name,
and for that purpose any attribute from among the divine attributes could have been adopted, But when, instead of saying that Allah, or the Creator, or the Provider, has taught this, it was said:
The Merciful (Ar- Rahman) has taught this Quran, it by itself gave the meaning that the revelation of the Quran for the guidance of mankind was nothing but Allah’s mercy and grace,
As He is most kind and Merciful to His creation, He did not like that He should leave them wandering in the darkness, and His mercy demanded that He should send down this Quran to bless them with the knowledge on which depends their right guidance and conduct in the world and their success and well-being in the Hereafter,