Sister Prophet SAW was sadden and Prophet Abram used to enquire about his parents status in the hereafter. The point is there is no gurantee we muslim will be entered into paradise as one can't gurantee if they will be raised as a beliver or not. It is sheer mercy of Allah and not our choice. The second point to grasp this life in reality is not a play thing (though most of us behave as if it is ours to live) and as such purpose is to recognise why we exist - exist as no more then humble servent of God, Unique in every sense, who begets none and nor is he begotten. Failing to realise this is a calamaty worse then anythingelse and price is punishment in the hereafter. The question is how we go about finding the pristine concept of God. It is not for us to question the sense of Justice if we do the greatest of injustice of not recognising puropose of existance which is to know God and example set for us. As for the inhabitants of Paradise, this is the reward from Allah, the most beneficent, the most merciful and not of their own doing in reality. There is no beleif in the heart of one who is arrogant and proud. Allahualam