Surah Ar-Ra'd, Ayah 37

The Truthful Ones from among the People of the Scriptures rejoice at what Allah has revealed to Muhammad ﷺ

Allah said,

وَالَّذِينَ ءَاتَيْنَـهُمُ الْكِتَـبَ

(Those to whom We have given the Book,) and they adhere by it,

يَفْرَحُونَ بِمَآ أُنزِلَ إِلَيْكَ

(rejoice at what has been revealed unto you,) i.e. the Qur'an, because they have evidence in their Books affirming the truth of the Qur'an and conveying the good news of its imminent revelation, just as Allah said in another Ayah,

الَّذِينَ آتَيْنَـهُمُ الْكِتَـبَ يَتْلُونَهُ حَقَّ تِلاَوَتِهِ

(Those to whom We gave the Book recite it as it should be recited.) 2:121 Allah said,

قُلْ ءَامِنُواْ بِهِ أَوْ لاَ تُؤْمِنُواْ

(Say: "Believe in it (the Qur'an) or do not believe.") 17:107, until,

In the verse: أَفَمَنْ هُوَ قَائِمٌ عَلَىٰ كُلِّ نَفْسٍ (Is then He, who is watchful over everyone ... 33), the ignorance and irrationality of the disbelievers has been exposed by saying that these people are certainly short on sense when they equate inert idols with His pure Being, a Being that watches everyone and is the ultimate reckoner of everyone's deeds. Then, it was said that the real reason behind their unreasonable attitude is that shaitan has made their very ignorance look good in their sight and, therefore, this they take to be 'achievement' and 'success.'

When the Quran was revealed, the Jews and the Christians were divided into two groups. Among these people, those who were God-fearing and who followed the true teachings of Moses and Jesus, treated the Quran as their inner voice and accepted it happily. But those who thought communal prejudice and groupism to be the real religion, could not recognize the truth appearing outside their familiar sphere and became its opponent. Their being without fear of God made them fearless of opposing the call of truth. One who becomes the opponent of truth solely on grounds of communal prejudice and groupism is, in fact, a follower of the desires of the self instead of God. As such he has turned away from the path of God. Making changes in the call of truth in consideration of such people is not permissible for one who preaches the word of God. It is necessary for him to be firm on pure truth in thought, word and deed. In the case of deniers, he has to be firm and persevering and not adopt the way of compromise. If a man continues to follow the dictates of his self in spite of the knowledge of truth being brought to him in his own understandable language, he incurs the risk of being completely deprived of God’s help.