Allah said,

﴿وَالَّذِينَ كَذَّبُواْ بِـْايَـتِنَا صُمٌّ وَبُكْمٌ فِى الظُّلُمَـتِ﴾

(Those who reject Our Ayat are deaf and dumb in darkness.) due to their ignorance, little knowledge and minute comprehension. Their example is that of the deaf-mute who cannot hear nor speak, as well as being blinded by darkness. Therefore, how can such a person find guidance to the path or change the condition he is in Allah said in other Ayat,

﴿مَثَلُهُمْ كَمَثَلِ الَّذِى اسْتَوْقَدَ نَاراً فَلَمَّآ أَضَاءَتْ مَا حَوْلَهُ ذَهَبَ اللَّهُ بِنُورِهِمْ وَتَرَكَهُمْ فِي ظُلُمَـتٍ لاَّ يُبْصِرُونَ - صُمٌّ بُكْمٌ عُمْىٌ فَهُمْ لاَ يَرْجِعُونَ ﴾

(Their parable is that of one who kindled a fire; then, when it illuminated all around him, Allah took away their light and left them in darkness. (So) they could not see. They are deaf, dumb, and blind, so they return not (to the right path)) ﴿2:17-18﴾, and,

﴿أَوْ كَظُلُمَـتٍ فِى بَحْرٍ لُّجِّىٍّ يَغْشَـهُ مَوْجٌ مِّن فَوْقِهِ مَوْجٌ مِّن فَوْقِهِ سَحَابٌ ظُلُمَـتٌ بَعْضُهَا فَوْقَ بَعْضٍ إِذَآ أَخْرَجَ يَدَهُ لَمْ يَكَدْ يَرَاهَا وَمَن لَّمْ يَجْعَلِ اللَّهُ لَهُ نُوراً فَمَا لَهُ مِن نُورٍ ﴾

(Or like the darkness in a vast deep sea, overwhelmed with a great wave topped by a great wave, topped by dark clouds, darkness, one above another, if a man stretches out his hand, he can hardly see it! And he for whom Allah has not appointed light, for him there is no light. ) ﴿24:40﴾ This is why Allah said here,

﴿مَن يَشَإِ اللَّهُ يُضْلِلْهُ وَمَن يَشَأْ يَجْعَلْهُ عَلَى صِرَطٍ مُّسْتَقِيمٍ﴾

(Allah sends astray whom He wills and He guides on the straight path whom He wills.) for He does what He wills with His creatures.

﴿قُلْ أَرَأَيْتُكُم إِنْ أَتَـكُمْ عَذَابُ اللَّهِ أَوْ أَتَتْكُمْ السَّاعَةُ أَغَيْرَ اللَّهِ تَدْعُونَ إِن كُنتُمْ صَـدِقِينَ - بَلْ إِيَّـهُ تَدْعُونَ فَيَكْشِفُ مَا تَدْعُونَ إِلَيْهِ إِنْ شَآءَ وَتَنسَوْنَ مَا تُشْرِكُونَ - وَلَقَدْ أَرْسَلنَآ إِلَى أُمَمٍ مِّن قَبْلِكَ فَأَخَذْنَـهُمْ بِالْبَأْسَآءِ وَالضَّرَّآءِ لَعَلَّهُمْ يَتَضَرَّعُونَ - فَلَوْلا إِذْ جَآءَهُمْ بَأْسُنَا تَضَرَّعُواْ وَلَـكِن قَسَتْ قُلُوبُهُمْ وَزَيَّنَ لَهُمُ الشَّيْطَـنُ مَا كَانُواّ يَعْمَلُونَ - فَلَمَّا نَسُواْ مَا ذُكِّرُواْ بِهِ فَتَحْنَا عَلَيْهِمْ أَبْوَابَ كُلِّ شَىْءٍ حَتَّى إِذَا فَرِحُواْ بِمَآ أُوتُواْ أَخَذْنَـهُمْ بَغْتَةً فَإِذَا هُمْ مُّبْلِسُونَ - فَقُطِعَ دَابِرُ الْقَوْمِ الَّذِينَ ظَلَمُواْ وَالْحَمْدُ للَّهِ رَبِّ الْعَـلَمِينَ ﴾

(40. Say: "Tell me if Allah's torment comes upon you, or the Hour comes upon you, would you then call upon any one other than Allah (Reply) if you are truthful!'') (41. Nay! To Him alone you call, and, if He willed, He would remove that (distress) for which you call upon Him, and you forget at that time whatever partners you joined with Him (in worship)!) (42. Verily, We sent (Messengers) to many nations before you. And We seized them with extreme poverty and loss of health so that they might believe with humility.) (43. When Our torment reached them, why then did they not believe with humility But their hearts became hardened, and Shaytan made fair-seeming to them that which they used to do.) (44. So, when they forgot (the warning) with which they had been reminded, We opened to them the gates of every (pleasant) thing, until in the midst of their enjoyment in that which they were given, all of a sudden, We took them to punishment, and lo! They were plunged into destruction with deep regrets and sorrows.) (45. So the roots of the people who did wrong were cut off. And all the praises and thanks be to Allah, the Lord of the all that exists.)