The perfect world, or eternity, which we want is not available here. It will be achievable only in the Hereafter. In this world we have to prepare. We have to lead our lives in such a way that we get eternal world as our reward.
The Quran says: أَلَا بِذِكْرِ اللَّهِ تَطْمَئِنُّ الْقُلُوبُ (13:28 “Surely in the remembrance of God hearts can find comfort.” Here, remembrance doesn’t mean to keep chanting God's name. Instead discovery of God's creation plan gives one peace of mind.If you want to lead your life without this discovery, you will live in darkness and never find peace. The Prophet said: اللَّهُمَّ لاَ عَيْشَ إِلَّا عَيْشُ الآخِرَهْ (Sahih al-Bukhari 3797) There is no joy except the joy of the Hereafter.
An ideology which takes into account the Hereafter, a plan of life which takes into account the Hereafter, will give you peace. In this world you don’t find peace. This is a contradiction. A human being has been made in the 'best mould' but this world in which he lives is a lesser place. A human being has been created as a perfection-seeking animal. But he has been placed in a world which is imperfect. This world is not perfect. (95:4-5)
It is imperfect in the sense that here you don’t find what you seek. You seek eternity and here you get to live for a brief period. You want to remain healthy forever, but you don’t get permanent good health. You don’t want to face accidents, but here you have to suffer accidents. You don’t want to experience boredom, but you do get bored. You want your intellectual journey to continue unhindered but you do face an end here. You want to fulfil certain desires but you aren't able to, because you don’t get the opportunity for enjoyment in this world. Every time a person realizes that he doesn’t get what he wants. A human being isn't ready to accept non-fulfilment. God created humans as perfection-seeking animals, but settled them in an imperfect world. This is the contradiction.
A study of the Quran helps in understanding the matter. The perfect world, or eternity, which I want is not available here. It will be achievable only in the Hereafter. In this world I have to prepare. I have to lead my life In such a way that I get eternal world as my reward.