Fear is the whip that leads the soul to God and the Hereafter. And without it, the soul will remain comfort and feeling free to do anything bad. Also without fear to Allah, someone will tends to abandon his responsibilities and obligations. Then he will say, “doesn’t matter, Allah will forgive me after this”.
In a hadith from Abu Hurairah (may Allah blesses him), the Prophet ﷺ narrated from Allah the Almighty, that Allah says,
وَعِزَّتِي لا أَجْمَعُ عَلَى عَبْدِي خَوْفَيْنِ وَأَمْنَيْنِ إِذَا خَافَنِي فِي الدُّنْيَا أَمَّنْتُهُ يَوْمَ الْقِيَامَةِ وَإِذَا أَمِنَنِي فِي الدُّنْيَا أَخَفْتُهُ يَوْمَ الْقِيَامَةِ
“By my might, I will assemble my servant either in fear or security. If he feared me in the world, I will make him safe on the Hereafter. If he felt secure from me in the world, I will make him fearful on the Hereafter” [Ibn Hibban, classed as Saheeh by al-Albani].
The two fears are the fear of the servant in this world and his fear on the Hereafter. If someone fears Allah and acts in obedience to Him, he will get the security of anything he fears on the Hereafter.
And the two security are security in this world and security on the Day of Resurrection. If someone feels safe in this world to commit any immoral and disobedience, he will get the worst fear on the Hereafter.
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