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The illusory character of man's earthbound concept of "time" is brought out in the Qur'an in several places. In the above context stress is laid, firstly, on the relativity of this concept - i.e., on the infinitesimal shortness of our life on earth as compared with the timeless duration of life in the hereafter (cf., for instance, 10:45 or 17:52 ) - and, secondly, on the resurrected sinners' self-deluding excuse that their life on earth had been too short to allow them to realize their errors and mend their ways. It is to this second aspect of the problem that the Qur'an alludes in the words, "thus were they wont to delude themselves" (lit., "to be turned away", i.e., from the truth). For an explanation of the verb yu'fikun, see surah {5}, note [90].
This interpolation - the meaning of which is elliptically implied here - shows the connection of the present passage with the preceding one, as well as with verses {11-16} and {27}.
Whatever the seeming inequalities may be now-when the good appear to be weak and the strong seem to oppress-will be removed when the balance will be finally redressed. That will happen in good time,-indeed so quickly that the Transgressors will be taken by Surprise. They were deluded by the fact that what they took to be their triumph or their freedom to do what they liked was only a reprieve, a "Term Appointed", in which they could repent and amend and get Allah's Mercy. Failing this, they will then be up against the Penalties which they thought they had evaded or defied.