A matchless specimen of comprehensiveness and brevity of the message of Qur’an, a whole world of meaning has been compressed into three short sentences in Surah 103, in few brief words, which is too vast in content to be fully expressed even in a book.
In it, in a clear and plain way it has been stated what is the way to true success & salvation for man and what is the way to ruin and destruction for him. The great scholar of Islam; Imam Shafie has very rightly said that if the people only consider (understand) this Chapter well, it alone would suffice them for their guidance(Ibne Kathir), he is also reported to have said that , if only this Chapter was revealed in the Qur’an, it would have been sufficient for the guidance of mankind (Abdah). How important this Surah was in the sight of the Companions can be judged from the tradition cited from Abdullah bin Hisn ad-Darimi Abu Madinah, according to which whenever any two of them met they would not part company until they had recited Surah Al-Asr to each other. (Tabarani). According to Imam Razi; This Surah  is very harsh, because Allah has decided to destroy all the mankind except those who comply with the four conditions i.e. to have faith, perform Righteous Deeds, urge one an other to Truth and to Patience and Constancy. It implies that the salvation is collectively contingent upon these four acts. As every human is concerned about his own self similarly he has to preach to others i.e. inviting to the Deen (Islam), advise to act on good things and avoid forbidden and the prohibitions. Read and watch click <<Essence of Quran in 3 Verses>>
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