Q 10:58

O mankind! There has come to you good advice from your Lord, and a cure for that which is in your breasts, – a guidance and a mercy for the believers (57)Say: "In the bounty of Allah, and in His mercy; therein let them rejoice." That is better than what (the wealth) they amass (58) The Qur'an is an Admonition, Cure, Mercy and Guidance Allah confers a great favor on His creatures in what He has sent down of the Gracious Qur'an to His Noble Messenger . He said: يَا أَيُّهَا النَّاسُ قَدْ جَاءَتْكُم مَّوْعِظَةٌ مِّن رَّبِّكُمْ (O mankind! There has come to you good advice from your Lord.) A warning and a shield from shameful deeds. وَشِفَاءٌ لِّمَا فِي الصُّدُورِ (and a cure for that which is in your breasts,) A cure from suspicion and doubts. The Qur'an removes all the filth and Shirk from the hearts. وَهُدًى وَرَحْمَةٌ (a guidance and a mercy) The guidance and the mercy from Allah are attained through it. This is only for those who believe in it and have firm faith in what it contains. As Allah said: وَنُنَزِّلُ مِنَ الْقُرْآنِ مَا هُوَ شِفَاءٌ وَرَحْمَةٌ لِّلْمُؤْمِنِينَ ۙ وَلَا يَزِيدُ الظَّالِمِينَ إِلَّا خَسَارًا (And We send down of the Qur'an that which is a cure and a mercy to those who believe, and it increases the wrongdoers nothing but loss.)(17:82) and; قُلْ هُوَ لِلَّذِينَ آمَنُوا هُدًى وَشِفَاءٌ (Say: "It is for those who believe, a guide and a cure.")(41: 44) Allah then said: قُلْ بِفَضْلِ اللَّهِ وَبِرَحْمَتِهِ فَبِذَٰلِكَ فَلْيَفْرَحُوا (Say: "In the bounty of Allah, and in His mercy; therein let them rejoice.") rejoice in what has come from Allah. Let them rejoice in the guidance and the religion of the truth. It is better than anything they might rejoice in, هُوَ خَيْرٌ مِّمَّا يَجْمَعُونَ That is better than what (the wealth) they amass. from the ruins of the world and its vanishing bloom undoubtedly.