[4]. This world is the place of striving and the Hereafter is the place of reward or punishment, where the believers will be rewarded with Paradise and the disbelievers will be punished with Hell.
Paradise is good and none but those who are good will enter it. Allāh is Good and accepts nothing but that which is good. So the way of Allāh with the people is to test them with calamities and tribulations, so that the believer may be known from the unbeliever and so that the truthful may be distinguished from the liar.