Sometimes when we are used to walk following a path that only a few people travelled by, our heart may deviate little by little till we forget that we are no longer in the right path. What we assumed right could be wrong yet we may not realised it till very late. A heart that is encapsulated with thousands of black sinful acts may no longer able to receive the light of guidance from Allah SWT. Hence, the purpose of a reminder.
For, Believers are those who, when Allah is mentioned, feel a tremor in their hearts, and when they hear His signs rehearsed, find their faith strengthened, and put (all) their trust in their Lord; [al-Anfal:2]
In this temporal world that continuously make our iman deviate from the path of truth, please continuously check our heart with the beautiful verses of Quran. Should it feel a sense of remorse and repentance following recitation of al-Quran, alhamdulillah. At least, there are a little bit of iman left in ourselves. For heart that does not feel anything from the magnificient verses of our Holy Book, only Allah true guidance can help enlighten the heart that has been forsaken by their iman.
Allah has revealed (from time to time) the most beautiful Message in the form of a Book, consistent with itself, (yet) repeating (its teaching in various aspects): the skins of those who fear their Lord tremble thereat; then their skins and their hearts do soften to the celebration of Allah's praises. Such is the guidance of Allah: He guides therewith whom He pleases, but such as Allah leaves to stray, can have none to guide. [Az-Zumar: 23]