[4]. This worldly life is the arena of toil and testing, while the Hereafter is the abode of reward or retribution — Paradise for the faithful, and Hell for the faithless.
Paradise is pure and good, and only the pure and good shall enter it. Allāh, the Most Good, accepts nothing but what is good.
Therefore, it is by divine wisdom that Allāh tries His servants with hardships, so that the believer may be distinguished from the unbeliever, and the truthful from the liar.