1. The meaning of taking an oath by the lucid Scripture has been explained in (E.N.1 of Surah Az-Zukhruf). Here also what has been sworn by is that Muhammad (peace be upon him) is not the author of this Book but We are the author, and this Book by itself is enough to provide a proof of that. Furthermore, it has been said that the night in which it was revealed was full of blessings. That is, the foolish and ignorant people, who have no idea of their own well being or otherwise, regard the revelation of this Book as a disaster for themselves and are deeply anxious as how to get rid of it. But, as a matter of fact, the Hour when We decided to send down this Book to arouse the heedless, was highly blessed for them and for all mankind.
Some commentators have expressed the opinion that the meaning of sending down the Quran in that night is that its revelation began during that night, and some others think that the whole of the Quran was transferred from Umm-ul- Kitab and entrusted to the bearers of revelation (angels), and then revealed to the Prophet (peace be upon him) as and when required and demanded by the occasion and circumstances during 23 years. As to what actually happened Allah alone has the best knowledge.
The night implies the same night which has been called lailat-ul-qadr in (Surah Al-Qadr, Ayat 1), There it has been said: We sent it down in a night of glory, and here: We sent it down in a blessed night. It was the night of the month of Ramadhan, as it is said in( Surah Al-Baqarah, Ayat 185): Ramadhan is the month in which the Quran was revealed.