Overall meaning : Allah Almighty points out that those who are worthy of His guidance are the believers, whose hearts find comfort in the remembrance of Allah, for it is indeed in the remembrance of Allah that people’s hearts find comfort and perfect peace. These believers, whose hearts are filled with true faith and do righteous deeds, will certainly be in a blissful state in the hereafter, experiencing sheer joy, and will have an excellent return to Allah’s good pleasure and Paradise.
Allah Almighty tells His Prophet, may Allah bless him and grant him peace, that he is not the first messenger to preach His message: Just as We sent prophets before you, so, too, We have sent you, Muhammad, with this Qur’an to convey it and recite it to people, before whom other nations had passed away to whom We also sent messengers; yet in their ignorance your people deny the oneness of the All-Merciful. Say to them, ‘I believe in the One in whom you have disbelieved. He alone is my Lord, Creator and Cherisher. There is no god worthy of worship except He. In Him do I put my trust, and to Him shall I return.’