In The Name of Allaah, The Most Merciful, The Bestower of Mercy
Allaah [The Most High] said:
يَا أَيُّهَا الَّذِينَ آمَنُوا اسْتَجِيبُوا لِلَّهِ وَلِلرَّسُولِ إِذَا دَعَاكُمْ لِمَا يُحْيِيكُمْ ۖ وَاعْلَمُوا أَنَّ اللَّهَ يَحُولُ بَيْنَ الْمَرْءِ وَقَلْبِهِ وَأَنَّهُ إِلَيْهِ تُحْشَرُونَ
O you who believe! Answer Allah [by obeying Him] and [His] Messenger when he calls you to that which will give you life, and know that Allah comes in between a person and his heart. And verily to Him you shall [all] be gathered. [8:24]
Few Reminders from the Above Aayah
Allaah [The Most High] commanded His believing slaves- regarding that which their Eemaan [obligates on] them- to respond to the call of Allaah and His Messenger–Meaning: Submit to what you have been commanded, hasten to fulfil it and convey it. Keep away from what you have been forbidden, renounce and forbid it. [إِذَا دَعَاكُمْ لِمَا يُحْيِيكُمْ – When he calls you to that which will give you life]; This is a description of everything Allaah and His Messenger call to; clarified its benefit and the wisdom behind it; for indeed the life of the hearts and the souls [i.e. their uprightness] is [established] through servitude to Allaah [The Most High], adhering [to the path of Allaah], exercising patience in obedience to Him and His Messenger. Then [came] the warning against lack of responding to the call of Allaah and that of His Messenger. Allaah [The Most High] said: [وَاعْلَمُوا أَنَّ اللَّهَ يَحُولُ بَيْنَ الْمَرْءِ وَقَلْبِهِ -And know that Allah comes in between a person and his heart] – Meaning: Therefore, beware of rejecting the command of Allaah when it comes to you at first, lest He comes between you and it – [prevents you from guidance as a just recompense] – when you turn away from it. Therefore, a servant should increase in [uttering] the [supplication]: [يَا مُقَلِّب الْقُلُوب ثَبِّتْ قَلْبـِي عَلَى دِينك – O turner of the hearts, keep my heart firm upon your Religion]. [وَأَنَّهُ إِلَيْهِ تُحْشَرُونَ – And verily to Him you shall (all) be gathered]- Meaning: To Him shall you be gathered on a day about which there is no doubt, so that He rewards the good doer for his good deeds and the sinner for his disobedience.
[Source: (Tayseer Al-Kareem Ar-Rahmaan Fee Tafseer Kalaam Al-Mannaan).Abridged & slightly paraphrased]