The Most Unjust among all People
Allah said,
﴿ وَمَنۡ أَظۡلَمُ مِمَّنِ ٱفۡتَرَىٰ عَلَى ٱللَّهِ ٱلۡكَذِبَ وَهُوَ يُدۡعَىٰٓ إِلَى ٱلۡإِسۡلَـٰمِۚ ﴾
(And who does more wrong than the one who invents a lie against Allah, while he is being invited to Islam) meaning, none is more unjust than he who lies about Allah and calls upon rivals and associates partners with Him, even while he is being invited to Tawhid and sincerely worshipping Him. This is why Allah said,
﴿ وَٱللَّهُ لَا يَهۡدِى ٱلۡقَوۡمَ ٱلظَّـٰلِمِينَ ﴾
(And Allah guides not the people who are wrongdoers.) Allah said,
﴿ يُرِيدُونَ لِيُطۡفِـُٔواْ نُورَ ٱللَّهِ بِأَفۡوَٲهِهِمۡ ﴾
(They intend to put out the Light of Allah with their mouths.) indicating that the disbelievers will try to contradict the truth with falsehood. Their attempts are similar to one's attempt to extinguish the sun with his mouth, which is impossible. Likewise is the case of their attempt to extinguish truth. So Allah said,
﴿ يُرِيدُونَ لِيُطۡفِـُٔواْ نُورَ ٱللَّهِ بِأَفۡوَٲهِهِمۡ وَٱللَّهُ مُتِمُّ نُورِهِۦ وَلَوۡ ڪَرِهَ ٱلۡكَـٰفِرُونَ • هُوَ ٱلَّذِىٓ أَرۡسَلَ رَسُولَهُ ۥ بِٱلۡهُدَىٰ وَدِينِ ٱلۡحَقِّ لِيُظۡهِرَهُ ۥ عَلَى ٱلدِّينِ كُلِّهِۦ وَلَوۡ كَرِهَ ٱلۡمُشۡرِكُونَ ﴾
(But Allah will bring His Light to perfection even though the disbelievers hate (it). He it is Who has sent His Messenger with guidance and the religion of truth to make it victorious over all (other) religions even though the idolaters hate (it).) We explained the meanings of similar Ayat before, in the Tafsir of Surah Bara'ah. All praise and thanks are due to Allah.
﴿ يَـٰٓأَيُّہَا ٱلَّذِينَ ءَامَنُواْ هَلۡ أَدُلُّكُمۡ عَلَىٰ تِجَـٰرَةٍ۬ تُنجِيكُم مِّنۡ عَذَابٍ أَلِيمٍ۬ • تُؤۡمِنُونَ بِٱللَّهِ وَرَسُولِهِۦ وَتُجَـٰهِدُونَ فِى سَبِيلِ ٱللَّهِ بِأَمۡوَٲلِكُمۡ وَأَنفُسِكُمۡۚ ذَٲلِكُمۡ خَيۡرٌ۬ لَّكُمۡ إِن كُنتُمۡ تَعۡلَمُونَ • يَغۡفِرۡ لَكُمۡ ذُنُوبَكُمۡ وَيُدۡخِلۡكُمۡ جَنَّـٰتٍ۬ تَجۡرِى مِن تَحۡتِہَا ٱلۡأَنۡہَـٰرُ وَمَسَـٰكِنَ طَيِّبَةً۬ فِى جَنَّـٰتِ عَدۡنٍ۬ۚ ذَٲلِكَ ٱلۡفَوۡزُ ٱلۡعَظِيمُ • وَأُخۡرَىٰ تُحِبُّونَہَاۖ نَصۡرٌ۬ مِّنَ ٱللَّهِ وَفَتۡحٌ۬ قَرِيبٌ۬ۗ وَبَشِّرِ ٱلۡمُؤۡمِنِينَ ﴾
(10. O you who believe! Shall I guide you to a trade that will save you from a painful torment) (11. That you believe in Allah and His Messenger, and that you strive hard and fight in the cause of Allah with your wealth and your lives, that will be better for you, if you but know!) (12. (If you do so) He will forgive you your sins, and admit you into Gardens under which rivers flow, and pleasant dwellings in `Adn (Eternal) Paradise; that is indeed the great success.) (13. And also (He will give you) another (blessing) which you love, help from Allah and a near victory. And give glad tidings to the believers.)