5. This they said satirically and mockingly. What they meant was: “This Prophet (peace be upon him) has been giving us the news of his coming of Resurrection for along time now, but Resurrection has not overtaken us so far although we have openly denied and rejected him as a Prophet, have been insolent to him and have ridiculed him in every way.
6. The use of the attribute “Knower of the unseen” for Allah while swearing by him by itself points to the fact that the coming of Resurrection is certain, but no one knows except Allah, Knower of the unseen, when exactly it will come. This same theme has been explained at different places in the Quran in various ways. For details, see (Surah Al-Aaraf: Ayat 187), (Surah TaHa: Ayat 15), (Surah Luqman: Ayat 34), (Surah Al-Ahzab: Ayat 63), (Surah Al-Mulk: Ayats 25-26), (Surah An-Naziyat: Ayats 42-44).
7. This is one of the arguments for the possibility of the Hereafter as is being stated in (verse 7) below. One of the reasons why the deniers of the Hereafter regarded the lifeafter- death as irrational was; They said that when all human beings will have become dust after death, and scattered away in particles, how it will be possible to bring all the countless particles together and combine them to be re-created as the same human bodies once again. This doubt has been dispelled, saying, “Every particle wherever it is, is recorded in God’s register, and God knows where a particle is. Therefore, when He wills to recreate, He will not face any difficulty in gathering together all the particles of the body of each and every man.”
8. The above was an argument for the possibility of the Hereafter: this is an argument for its need and necessity. It means: A time must come when the wicked should be requited for their wickedness and the righteous rewarded for their righteousness. Reason wants and justice demands that a worker of goodness should be rewarded and a worker of evil punished. Now when you see that in the present worldly life neither is an evildoer fully requited for his evil nor a worker of goodness for his goodness, rather there are opposite results of evil and goodness in most cases, you should admit that this necessary demand of both reason and justice must be fulfilled at some time in the future. Resurrection and the Hereafter will be the same time. It is not its coming but its not coming which is contrary to reason and against justice.
In this connection, another point becomes evident from the preceding verses. They tell that the result of faith and righteous acts is forgiveness and a bounteous provision, and for those who strive and act antagonistically in order to discredit and defeat Allah’s religion, there will be a torment of the worst kind. This makes it manifest that he who believes sincerely will not be deprived of forgiveness even though he may not get a bounteous provision owing to some flaw or weakness in his deeds. And the one who is a disbeliever but who does not adopt an attitude of enmity and antagonism towards the true faith, will not be able to avoid the torment but he will be saved from the worst torment.