Surat Ar-Ra`d (27-28)

{وَيَقُولُ الَّذِينَ كَفَرُواْ لَوْلاَ أُنزِلَ عَلَيْهِ آيَةٌ مِّن رَّبِّهِ قُلْ إِنَّ اللّهَ يُضِلُّ مَن يَشَاءُ وَيَهْدِي إِلَيْهِ مَنْ أَنَابَ} (الرعد : 27)

27- The infidels of Makkah said: Would some miracles be sent down to Muhammad from his Lord? They asked for more than one miracle to make him unable to achieve that. Surat Al Isra' spoke about some of these requests in Allah's Saying: "And they say: "We shall not believe in you (O Muhammad peace be upon him), until you cause a spring to gush forth from the earth for us;" * Or you have a garden of date-palms and grapes, and cause rivers to gush forth in its midst abundantly; * Or you cause the heaven to fall upon us in pieces, as you have pretended, or you bring Allâh and the angels before (us) face to face; * Or you have a house of Zukhruf (like silver and pure gold ), or you ascend up into the sky, and even then we will put no faith in your ascension until you bring down for us a Book that we would read. Say (O Muhammad peace be upon him): Glorified (and Exalted) is my Lord [(Allâh) above all that evil they (polytheists) associate with Him]! Am I anything but a man, sent as a Messenger?"

Allah is Able over everything and nothing can fail Him. If Allah had responded to their requests then they disbelieved, He would have destroyed them.

Guidance and misguidance are not bound by signs and miracles as they have incentives in souls and causes to lead to them. Indeed, Allah misguide whomever He wills because they deserve error such as those stubbornness disbelievers and guides whomever accepts the truth and returns to His Lord from the believers because they follow the truth and return to Allah and seek His Help.

{الَّذِينَ آمَنُواْ وَتَطْمَئِنُّ قُلُوبُهُم بِذِكْرِ اللّهِ أَلاَ بِذِكْرِ اللّهِ تَطْمَئِنُّ الْقُلُوبُ} (الرعد : 28)

28- Those are the people in whose hearts faith has become firm and by Allah's Words their souls feel comfort and become satisfied with Him as a merciful god. Indeed, by the mention of Allah hearts find rest.