Reason of Quran about monotheism as sign of veracity of prophet invitation

One of the most important matters that Quran emphasizes is matter of invitation toward God. Quran states about this invitation
وَمَا كَانَ هَٰذَا الْقُرْآنُ أَن يُفْتَرَىٰ مِن دُونِ اللَّهِ وَلَٰكِن تَصْدِيقَ الَّذِي بَيْنَ يَدَيْهِ وَتَفْصِيلَ الْكِتَابِ لَا رَيْبَ فِيهِ مِن رَّبِّ الْعَالَمِينَ
This Qur´an is not such as can be produced by other than Allah; on the contrary it is a confirmation of (revelations) that went before it, and a fuller explanation of the Book - wherein there is no doubt - from the Lord of the worlds.
Quran states that its claim is out of doubt and there is certainty about it;
وَمَا كَانَ هَٰذَا الْقُرْآنُ أَن يُفْتَرَىٰ مِن دُونِ اللَّهِ وَلَٰكِن تَصْدِيقَ الَّذِي بَيْنَ يَدَيْهِ وَتَفْصِيلَ الْكِتَابِ لَا رَيْبَ فِيهِ مِن رَّبِّ الْعَالَمِينَ
This Qur´an is not such as can be produced by other than Allah; on the contrary it is a confirmation of (revelations) that went before it, and a fuller explanation of the Book - wherein there is no doubt - from the Lord of the worlds.
Quran states that it is universal and eternal for all of people in all eras;
نَذِيرًا لِّلْبَشَرِ
A warning to mankind.
أُولَٰئِكَ الَّذِينَ هَدَى اللَّهُ ۖ فَبِهُدَاهُمُ اقْتَدِهْ ۗ قُل لَّا أَسْأَلُكُمْ عَلَيْهِ أَجْرًا ۖ إِنْ هُوَ إِلَّا ذِكْرَىٰ لِلْعَالَمِينَ
Those were the (prophets) who received Allah´s guidance: Copy the guidance they received; Say: "No reward for this do I ask of you: This is no less than a message for the nations.
Quran states about monotheism
قَالَتْ رُسُلُهُمْ أَفِي اللَّهِ شَكٌّ فَاطِرِ السَّمَاوَاتِ وَالْأَرْضِ ۖ يَدْعُوكُمْ لِيَغْفِرَ لَكُم مِّن ذُنُوبِكُمْ وَيُؤَخِّرَكُمْ إِلَىٰ أَجَلٍ مُّسَمًّى ۚ قَالُوا إِنْ أَنتُمْ إِلَّا بَشَرٌ مِّثْلُنَا تُرِيدُونَ أَن تَصُدُّونَا عَمَّا كَانَ يَعْبُدُ آبَاؤُنَا فَأْتُونَا بِسُلْطَانٍ مُّبِينٍ
Their messengers said: "Is there a doubt about Allah, The Creator of the heavens and the earth? It is He Who invites you, in order that He may forgive you your sins and give you respite for a term appointed!" They said: "Ah! ye are no more than human, like ourselves! Ye wish to turn us away from the (gods) our fathers used to worship: then bring us some clear authority.
There is no doubt about the principle of the religion and Quran;
الْكَ آيَاتُ الْكِتَابِ ۗ وَالَّذِي أُنزِلَ إِلَيْكَ مِن رَّبِّكَ الْحَقُّ وَلَٰكِنَّ أَكْثَرَ النَّاسِ لَا يُؤْمِنُونَ
A.L.M.R. These are the signs (or verses) of the Book: that which hath been revealed unto thee from thy Lord is the Truth; but most men believe not.
Quran states
الم
A.L.M
ذَٰلِكَ الْكِتَابُ لَا رَيْبَ ۛ فِيهِ ۛ هُدًى لِّلْمُتَّقِينَ
This is the Book; in it is guidance sure, without doubt, to those who fear Allah.
Quran states that there is no doubt about the resurrection;
رَبَّنَا إِنَّكَ جَامِعُ النَّاسِ لِيَوْمٍ لَّا رَيْبَ فِيهِ ۚ إِنَّ اللَّهَ لَا يُخْلِفُ الْمِيعَادَ
Our Lord! Thou art He that will gather mankind Together against a day about which there is no doubt; for Allah never fails in His promise.
Quran states that even believers and materialistic persons know that the world has a foundation;
وَلَوْ تَرَىٰ إِذِ الْمُجْرِمُونَ نَاكِسُو رُءُوسِهِمْ عِندَ رَبِّهِمْ رَبَّنَا أَبْصَرْنَا وَسَمِعْنَا فَارْجِعْنَا نَعْمَلْ صَالِحًا إِنَّا مُوقِنُونَ
If only thou couldst see when the guilty ones will bend low their heads before their Lord, (saying:) "Our Lord! We have seen and we have heard: Now then send us back (to the world): we will work righteousness: for we do indeed (now) believe.
God interprets Quran as reason;
يَا أَيُّهَا النَّاسُ قَدْ جَاءَكُم بُرْهَانٌ مِّن رَّبِّكُمْ وَأَنزَلْنَا إِلَيْكُمْ نُورًا مُّبِينًا
O mankind! verily there hath come to you a convincing proof from your Lord: For We have sent unto you a light (that is) manifest.
Quran states about the miracles of Hazrat Musa (peace be upon him)
سْلُكْ يَدَكَ فِي جَيْبِكَ تَخْرُجْ بَيْضَاءَ مِنْ غَيْرِ سُوءٍ وَاضْمُمْ إِلَيْكَ جَنَاحَكَ مِنَ الرَّهْبِ ۖ فَذَانِكَ بُرْهَانَانِ مِن رَّبِّكَ إِلَىٰ فِرْعَوْنَ وَمَلَئِهِ ۚ إِنَّهُمْ كَانُوا قَوْمًا فَاسِقِينَ
Move thy hand into thy bosom, and it will come forth white without stain (or harm), and draw thy hand close to thy side (to guard) against fear. Those are the two credentials from thy Lord to Pharaoh and his Chiefs: for truly they are a people rebellious and wicked.
Quran states
إِنَّمَا يَسْتَأْذِنُكَ الَّذِينَ لَا يُؤْمِنُونَ بِاللَّهِ وَالْيَوْمِ الْآخِرِ وَارْتَابَتْ قُلُوبُهُمْ فَهُمْ فِي رَيْبِهِمْ يَتَرَدَّدُونَ
Only those ask thee for exemption who believe not in Allah and the Last Day, and whose hearts are in doubt, so that they are tossed in their doubts to and fro.
أَلَمْ يَأْتِكُمْ نَبَأُ الَّذِينَ مِن قَبْلِكُمْ قَوْمِ نُوحٍ وَعَادٍ وَثَمُودَ ۛ وَالَّذِينَ مِن بَعْدِهِمْ ۛ لَا يَعْلَمُهُمْ إِلَّا اللَّهُ ۚ جَاءَتْهُمْ رُسُلُهُم بِالْبَيِّنَاتِ فَرَدُّوا أَيْدِيَهُمْ فِي أَفْوَاهِهِمْ وَقَالُوا إِنَّا كَفَرْنَا بِمَا أُرْسِلْتُم بِهِ وَإِنَّا لَفِي شَكٍّ مِّمَّا تَدْعُونَنَا إِلَيْهِ مُرِيبٍ
Has not the story reached you, (O people!), of those who (went) before you? - of the people of Noah, and ´Ad, and Thamud? - And of those who (came) after them? None knows them but Allah. To them came messengers with Clear (Signs); but they put their hands up to their mouths, and said: "We do deny (the mission) on which ye have been sent, and we are really in suspicious (disquieting) doubt as to that to which ye invite us.
Quran states that all trains and beliefs of human influence happiness of persons;
وَيَوْمَ نَبْعَثُ فِي كُلِّ أُمَّةٍ شَهِيدًا عَلَيْهِم مِّنْ أَنفُسِهِمْ ۖ وَجِئْنَا بِكَ شَهِيدًا عَلَىٰ هَٰؤُلَاءِ ۚ وَنَزَّلْنَا عَلَيْكَ الْكِتَابَ تِبْيَانًا لِّكُلِّ شَيْءٍ وَهُدًى وَرَحْمَةً وَبُشْرَىٰ لِلْمُسْلِمِينَ
One day We shall raise from all Peoples a witness against them, from amongst themselves: and We shall bring thee as a witness against these (thy people): and We have sent down to thee the Book explaining all things, a Guide, a Mercy, and Glad Tidings to Muslims.
Quran states that no one can talk about Quran;
وَمَا كَانَ هَٰذَا الْقُرْآنُ أَن يُفْتَرَىٰ مِن دُونِ اللَّهِ وَلَٰكِن تَصْدِيقَ الَّذِي بَيْنَ يَدَيْهِ وَتَفْصِيلَ الْكِتَابِ لَا رَيْبَ فِيهِ مِن رَّبِّ الْعَالَمِينَ
This Qur´an is not such as can be produced by other than Allah; on the contrary it is a confirmation of (revelations) that went before it, and a fuller explanation of the Book - wherein there is no doubt - from the Lord of the worlds.
Quran states about the miracle of Hazrat Christ (peace be upon him)
فَأَشَارَتْ إِلَيْهِ ۖ قَالُوا كَيْفَ نُكَلِّمُ مَن كَانَ فِي الْمَهْدِ صَبِيًّا
But she pointed to the babe. They said: "How can we talk to one who is a child in the cradle''.
Quran states about the creation of the world
أَمْ خُلِقُوا مِنْ غَيْرِ شَيْءٍ أَمْ هُمُ الْخَالِقُونَ
Were they created of nothing, or were they themselves the creators?
أَمْ خَلَقُوا السَّمَاوَاتِ وَالْأَرْضَ ۚ بَل لَّا يُوقِنُونَ
Or did they create the heavens and the earth? Nay, they have no firm belief.
وَهُوَ الَّذِي مَدَّ الْأَرْضَ وَجَعَلَ فِيهَا رَوَاسِيَ وَأَنْهَارًا ۖ وَمِن كُلِّ الثَّمَرَاتِ جَعَلَ فِيهَا زَوْجَيْنِ اثْنَيْنِ ۖ يُغْشِي اللَّيْلَ النَّهَارَ ۚ إِنَّ فِي ذَٰلِكَ لَآيَاتٍ لِّقَوْمٍ يَتَفَكَّرُونَ
And it is He who spread out the earth, and set thereon mountains standing firm and (flowing) rivers: and fruit of every kind He made in pairs, two and two: He draweth the night as a veil o´er the Day. Behold, verily in these things there are signs for those who consider.
Quran states about day and night;
ذَٰلِكَ بِأَنَّ اللَّهَ يُولِجُ اللَّيْلَ فِي النَّهَارِ وَيُولِجُ النَّهَارَ فِي اللَّيْلِ وَأَنَّ اللَّهَ سَمِيعٌ بَصِيرٌ
That is because Allah merges night into day, and He merges day into night, and verily it is Allah Who hears and sees (all things).
Quran states that there are a lot of gardens in a land;
وَفِي الْأَرْضِ قِطَعٌ مُّتَجَاوِرَاتٌ وَجَنَّاتٌ مِّنْ أَعْنَابٍ وَزَرْعٌ وَنَخِيلٌ صِنْوَانٌ وَغَيْرُ صِنْوَانٍ يُسْقَىٰ بِمَاءٍ وَاحِدٍ وَنُفَضِّلُ بَعْضَهَا عَلَىٰ بَعْضٍ فِي الْأُكُلِ ۚ إِنَّ فِي ذَٰلِكَ لَآيَاتٍ لِّقَوْمٍ يَعْقِلُونَ
And in the earth are tracts (diverse though) neighbouring, and gardens of vines and fields sown with corn, and palm trees - growing out of single roots or otherwise: watered with the same water, yet some of them We make more excellent than others to eat. Behold, verily in these things there are signs for those who understand.
هُوَ الَّذِي يُصَوِّرُكُمْ فِي الْأَرْحَامِ كَيْفَ يَشَاءُ ۚ لَا إِلَٰهَ إِلَّا هُوَ الْعَزِيزُ الْحَكِيمُ
He it is Who shapes you in the wombs as He pleases. There is no god but He, the Exalted in Might, the Wise.
هُوَ الَّذِي أَنزَلَ عَلَيْكَ الْكِتَابَ مِنْهُ آيَاتٌ مُّحْكَمَاتٌ هُنَّ أُمُّ الْكِتَابِ وَأُخَرُ مُتَشَابِهَاتٌ ۖ فَأَمَّا الَّذِينَ فِي قُلُوبِهِمْ زَيْغٌ فَيَتَّبِعُونَ مَا تَشَابَهَ مِنْهُ ابْتِغَاءَ الْفِتْنَةِ وَابْتِغَاءَ تَأْوِيلِهِ ۗ وَمَا يَعْلَمُ تَأْوِيلَهُ إِلَّا اللَّهُ ۗ وَالرَّاسِخُونَ فِي الْعِلْمِ يَقُولُونَ آمَنَّا بِهِ كُلٌّ مِّنْ عِندِ رَبِّنَا ۗ وَمَا يَذَّكَّرُ إِلَّا أُولُو الْأَلْبَابِ
He it is Who has sent down to thee the Book: In it are verses basic or fundamental (of established meaning); they are the foundation of the Book: others are allegorical. But those in whose hearts is perversity follow the part thereof that is allegorical, seeking discord, and searching for its hidden meanings, but no one knows its hidden meanings except Allah. And those who are firmly grounded in knowledge say: "We believe in the Book; the whole of it is from our Lord:" and none will grasp the Message except men of understanding.
فَلَمَّا وَضَعَتْهَا قَالَتْ رَبِّ إِنِّي وَضَعْتُهَا أُنثَىٰ وَاللَّهُ أَعْلَمُ بِمَا وَضَعَتْ وَلَيْسَ الذَّكَرُ كَالْأُنثَىٰ ۖ وَإِنِّي سَمَّيْتُهَا مَرْيَمَ وَإِنِّي أُعِيذُهَا بِكَ وَذُرِّيَّتَهَا مِنَ الشَّيْطَانِ الرَّجِيمِ
When she was delivered, she said: "O my Lord! Behold! I am delivered of a female child!"- and Allah knew best what she brought forth- "And no wise is the male Like the female. I have named her Mary, and I commend her and her offspring to Thy protection from the Evil One, the Rejected.
فَتَقَبَّلَهَا رَبُّهَا بِقَبُولٍ حَسَنٍ وَأَنبَتَهَا نَبَاتًا حَسَنًا وَكَفَّلَهَا زَكَرِيَّا ۖ كُلَّمَا دَخَلَ عَلَيْهَا زَكَرِيَّا الْمِحْرَابَ وَجَدَ عِندَهَا رِزْقًا ۖ قَالَ يَا مَرْيَمُ أَنَّىٰ لَكِ هَٰذَا ۖ قَالَتْ هُوَ مِنْ عِندِ اللَّهِ ۖ إِنَّ اللَّهَ يَرْزُقُ مَن يَشَاءُ بِغَيْرِ حِسَابٍ
Right graciously did her Lord accept her: He made her grow in purity and beauty: To the care of Zakariya was she assigned. Every time that he entered (Her) chamber to see her, He found her supplied with sustenance. He said: "O Mary! Whence (comes) this to you?" She said: "From Allah: for Allah Provides sustenance to whom He pleases without measure.
رَسُولًا إِلَىٰ بَنِي إِسْرَائِيلَ أَنِّي قَدْ جِئْتُكُم بِآيَةٍ مِّن رَّبِّكُمْ ۖ أَنِّي أَخْلُقُ لَكُم مِّنَ الطِّينِ كَهَيْئَةِ الطَّيْرِ فَأَنفُخُ فِيهِ فَيَكُونُ طَيْرًا بِإِذْنِ اللَّهِ ۖ وَأُبْرِئُ الْأَكْمَهَ وَالْأَبْرَصَ وَأُحْيِي الْمَوْتَىٰ بِإِذْنِ اللَّهِ ۖ وَأُنَبِّئُكُم بِمَا تَأْكُلُونَ وَمَا تَدَّخِرُونَ فِي بُيُوتِكُمْ ۚ إِنَّ فِي ذَٰلِكَ لَآيَةً لَّكُمْ إِن كُنتُم مُّؤْمِنِينَ
And (appoint him) a messenger to the Children of Israel, (with this message): "´I have come to you, with a Sign from your Lord, in that I make for you out of clay, as it were, the figure of a bird, and breathe into it, and it becomes a bird by Allah´s leave: And I heal those born blind, and the lepers, and I quicken the dead, by Allah´s leave; and I declare to you what ye eat, and what ye store in your houses. Surely therein is a Sign for you if ye did believe.
قُلْ هَلْ مِن شُرَكَائِكُم مَّن يَهْدِي إِلَى الْحَقِّ ۚ قُلِ اللَّهُ يَهْدِي لِلْحَقِّ ۗ أَفَمَن يَهْدِي إِلَى الْحَقِّ أَحَقُّ أَن يُتَّبَعَ أَمَّن لَّا يَهِدِّي إِلَّا أَن يُهْدَىٰ ۖ فَمَا لَكُمْ كَيْفَ تَحْكُمُونَ
Say: "Of your ´partners´ is there any that can give any guidance towards truth?" Say: "It is Allah Who gives guidance towards truth, is then He Who gives guidance to truth more worthy to be followed, or he who finds not guidance (himself) unless he is guided? what then is the matter with you? How judge ye.
In conclusion, there is no doubt about the claim of Quran because it is accompanied with reason.