Quran, in many places of itself, is really focusing on this fact that the heaven is for believers because they was patient in their Earth's life. For example please read these [23:101]:
فَإِذَا نُفِخَ فِي الصُّورِ فَلَا أَنسَابَ بَيْنَهُمْ يَوْمَئِذٍ وَلَا يَتَسَاءَلُونَ ﴿١٠١﴾فَمَن ثَقُلَتْ مَوَازِينُهُ فَأُولَـٰئِكَ هُمُ الْمُفْلِحُونَ ﴿١٠٢﴾وَمَنْ خَفَّتْ مَوَازِينُهُ فَأُولَـٰئِكَ الَّذِينَ خَسِرُوا أَنفُسَهُمْ فِي جَهَنَّمَ خَالِدُونَ ﴿١٠٣﴾تَلْفَحُ وُجُوهَهُمُ النَّارُ وَهُمْ فِيهَا كَالِحُونَ ﴿١٠٤﴾ أَلَمْ تَكُنْ آيَاتِي تُتْلَىٰ عَلَيْكُمْ فَكُنتُم بِهَا تُكَذِّبُونَ ﴿١٠٥﴾قَالُوا رَبَّنَا غَلَبَتْ عَلَيْنَا شِقْوَتُنَا وَكُنَّا قَوْمًا ضَالِّينَ ﴿١٠٦﴾رَبَّنَا أَخْرِجْنَا مِنْهَا فَإِنْ عُدْنَا فَإِنَّا ظَالِمُونَ ﴿١٠٧﴾قَالَ اخْسَئُوا فِيهَا وَلَا تُكَلِّمُونِ ﴿١٠٨﴾إِنَّهُ كَانَ فَرِيقٌ مِّنْ عِبَادِي يَقُولُونَ رَبَّنَا آمَنَّا فَاغْفِرْ لَنَا وَارْحَمْنَا وَأَنتَ خَيْرُ الرَّاحِمِينَ ﴿١٠٩﴾فَاتَّخَذْتُمُوهُمْ سِخْرِيًّا حَتَّىٰ أَنسَوْكُمْ ذِكْرِي وَكُنتُم مِّنْهُمْ تَضْحَكُونَ ﴿١١٠﴾إِنِّي جَزَيْتُهُمُ الْيَوْمَ بِمَا صَبَرُوا أَنَّهُمْ هُمُ الْفَائِزُونَ ﴿١١١﴾
So when the Horn is blown, no relationship will there be among them that Day, nor will they ask about one another. (101)And those whose scales are heavy [with good deeds] - it is they who are the successful. (102)But those whose scales are light - those are the ones who have lost their souls, [being] in Hell, abiding eternally. (103)The Fire will sear their faces, and they therein will have taut smiles. (104)[It will be said]. "Were not My verses recited to you and you used to deny them?" (105)They will say, "Our Lord, our wretchedness overcame us, and we were a people astray. (106)Our Lord, remove us from it, and if we were to return [to evil], we would indeed be wrongdoers." (107)He will say, "Remain despised therein and do not speak to Me. (108)Indeed, there was a party of My servants who said, 'Our Lord, we have believed, so forgive us and have mercy upon us, and You are the best of the merciful.' (109)But you took them in mockery to the point that they made you forget My remembrance, and you used to laugh at them. (110)Indeed, I have rewarded them this Day for their patient endurance - that they are the attainers [of success]." (111)
These show that the believer's life is as hard as and as down as much that even some people take them mockery and laught at them!
I know that a lot of Muslims not only have such a life but also have very better life than others Muslims and non-Muslims. An example is Saudi Arabia's King and his sons and family and in general political people in Islamic's countries. They have control on world's Oil and so rich and so an easy and very different, patient-free life. I think such people will not reach the heaven at all according to these sentences from Qur'an. Am I wrong?