Why these two are mentioned together in some part of Quran like Bismillah and Surah-al-Fatiha Quran doesn't have a single extra word, each and every word has hidden hikmah more vast than galaxies, than why this? they point to two different dimensions of mercy. Root is the same — meaning is not Both come from ر-ح-م (rahmah) = mercy, care Ar-Rahmān (ٱلرَّحْمَٰن) Meaning: Overwhelming, vast, universal mercy - Covers everyone — believer, non-believer, human, animal, planet, air (Intense and overflowing) - A name exclusive to Allah (no one else can be called Rahmān properly) Think: rain falls on all That’s Ar-Rahmān. Ar-Rahīm (ٱلرَّحِيم) Meaning: Special, continuous, personal mercy - Selective Especially for the believer (Ongoing and lasting) - Shows up most clearly in guidance, forgiveness, and the Hereafter Think: forgiveness after repentance , guidance to truth That’s Ar-Rahīm. Why repeat them in Bismillah and Al-Fātiḥah? Because they set the entire tone of the Qur’an. It’s like saying: “I care about everyone, and I care about you specifically. And there are ayahs where one is mentioned and other is not.Why they’re sometimes together, sometimes not - Together → Complete mercy (global + personal) - Rahmān alone → Majesty, authority, overwhelming mercy - Rahīm alone → Closeness, forgiveness, care for believers. the more you notice this, the harder it becomes to see the Qur’an as anything but deliberately engineered language. ALSO Ar-Rahmān is never used for humans but Rahīm sometimes is — that’s another fascinating layer.