1- There is no doubt about the day of judgment.
4:87 Allah, There is no god but He; of a surety He will gather you together against the day of judgment, about which there is no doubt. And whose word can be truer than Allah's?
اللّهُ لا إِلَـهَ إِلاَّ هُوَ لَيَجْمَعَنَّكُمْ إِلَى يَوْمِ الْقِيَامَةِ لاَ رَيْبَ فِيهِ وَمَنْ أَصْدَقُ مِنَ اللّهِ حَدِيثًا
2- God will justly judge us:
21:47 We shall set up scales of justice for the day of judgment, so that not a soul will be dealt with unjustly in the least, and if there be (no more than) the weight of a mustard seed, We will bring it (to account): and enough are We to take account.
وَنَضَعُ الْمَوَازِينَ الْقِسْطَ لِيَوْمِ الْقِيَامَةِ فَلَا تُظْلَمُ نَفْسٌ شَيْئًا وَإِن كَانَ مِثْقَالَ حَبَّةٍ مِّنْ خَرْدَلٍ أَتَيْنَا
3- That is the day that Satan promised to have most of us in his camp:
17:62 He said: "Seest Thou? this is the one whom Thou hast honored above me! If Thou wilt but respite me to the day of judgment, I will surely bring his descendants under my sway - all but a few!"
قَالَ أَرَأَيْتَكَ هَـذَا الَّذِي كَرَّمْتَ عَلَيَّ لَئِنْ أَخَّرْتَنِ إِلَى يَوْمِ الْقِيَامَةِ لأَحْتَنِكَنَّ ذُرِّيَّتَهُ إَلاَّ قَلِيلاً
4- Meanwhile, we did not justly estimate God. He is the one who owns the day of judgment. If we estimate his glory we would not make partners to him (all idols, humans and non-humans):
39:67 No just estimate have they made of Allah, such as is due to Him: On the day of judgment the whole of the earth will be but His handful, and the heavens will be rolled up in His right hand: Glory to Him! High is He above the Partners they attribute to Him!
وَمَا قَدَرُوا اللَّهَ حَقَّ قَدْرِهِ وَالْأَرْضُ جَمِيعًا قَبْضَتُهُ يَوْمَ الْقِيَامَةِ وَالسَّماوَاتُ مَطْوِيَّاتٌ بِيَمِينِهِ سُبْحَانَهُ وَتَعَالَى عَمَّا يُشْرِكُونَ
5- We continue to ignore his signs. Those who did not estimate God would have no weight on the day of judgment:
18:105 They are those who deny the Signs of their Lord and the fact of their having to meet Him (in the Hereafter): vain will be their works, nor shall We, on the day of judgment, give them any weight.
أُولَئِكَ الَّذِينَ كَفَرُوا بِآيَاتِ رَبِّهِمْ وَلِقَائِهِ فَحَبِطَتْ أَعْمَالُهُمْ فَلَا نُقِيمُ لَهُمْ يَوْمَ الْقِيَامَةِ وَزْنًا
6- The idols (humans, gold, money...) they took as partners to God will not stand for them on the day of judgment:
16:27 Then, on the day of judgment, He will cover them with shame, and say: "Where are My 'partners' concerning whom ye used to dispute (with the godly)?" Those endued with knowledge will say: "This day, indeed, are the Unbelievers covered with shame and misery,-
ثُمَّ يَوْمَ الْقِيَامَةِ يُخْزِيهِمْ وَيَقُولُ أَيْنَ شُرَكَآئِيَ الَّذِينَ كُنتُمْ تُشَاقُّونَ فِيهِمْ قَالَ الَّذِينَ أُوتُواْ الْعِلْمَ إِنَّ الْخِزْيَ الْيَوْمَ وَالْسُّوءَ عَلَى الْكَافِرِينَ
7- They will not be only devoid of partners, every one will present singly to God on the day of judgment:
19:95 And everyone of them will come to Him singly on the day of judgment.
وَكُلُّهُمْ آتِيهِ يَوْمَ الْقِيَامَةِ فَرْدًا