[13].Surah Ar-Ra'd [The Thunder] : Ayat 30

Ayat 30. Thus have We sent you (O Muhammad  [SAWW](PBUH) to a community before whom other communities have passed away, in order that you might recite unto them what We have inspired to you, while they disbelieve in the Most Beneficent (Allah) Say: "He is my Lord! Lâ ilaha illa Huwa (none has the right to be worshipped but He)! In Him is my trust, and to Him will be my return with repentance." 

Hazrat Tamim bin Aus Ad-Dari (May Allah be pleased with him) reported: The Messenger of Allah  [SAWW](PBUH) said, "Ad-Deen is sincerity". We said: "For whom?'' He replied, "For Allah, His Book, His Messenger and for the leaders of the Muslims and their masses".

[Muslim Book 01, Chapter 24, Hadith # 098].

Lesson : as mentioned above in Surah Ar-Ra'd Ayat 30. "in order that you might recite unto them what We have inspired to you, while they disbelieve." This Hadith stresses the importance and merits of general sincerity. Sincerity for Allah here means that one must have true faith in Him and He should be worshipped with full devotion and sincerity. Sincerity for the Qur'an means that one should confirm its truth with one's full heart and mind, recite it regularly, act upon the injunctions contained in it with meticulous care and strictly avoid its misinterpretation. Sincerity of the Prophet (PBUH) means sincere confirmation of his Prophethood, faithful obedience of his orders and adherence to his Sunnah. The goodwill of the Muslim rulers stands here for co-operating with them in their lawful orders and obedience of their such orders which are free from any trace of sin. If they deviate from the Straight Path they should be persuaded to turn to virtue. One should not revolt against them unless they commit infidelity. The goodwill of the Muslim masses means that one should work for the betterment of their life in this world and the Hereafter. They should be provided the right guidance, induced to perform good deeds and deterred from evils.