يَا أَيُّهَا الَّذِينَ آمَنُوا اتَّقُوا اللَّهَ وَلْتَنظُرْ نَفْسٌ مَّا قَدَّمَتْ لِغَدٍ وَاتَّقُوا اللَّهَ إِنَّ اللَّهَ خَبِيرٌ بِمَا تَعْمَلُونَ
O you who have believed, fear Allah . And let every soul look to what it has put forth for tomorrow – and fear Allah. Indeed, Allah is Acquainted with what you do. [Qur’an 59:18]
According to some of the great imams of the past, this Verse is evidence to show one should take account of themselves (Muhaasaba).
This means thinking everyday about what a person has done, how they did it and why. Trying to make sure they do it to please Allah and do it in the way the Prophet (saw) did it.
This constant self reflection will help one to humble oneself, realise ones shortcomings and work on oneself constantly as opposed to the one who goes by days, months, years and is heedless of his shortcomings leading to ignorance of his own state, a hard heart and a heavy accountability on the Last Day.