13:11
إِنَّ اللَّهَ لَا يُغَيِّرُ مَا بِقَوْمٍ حَتَّىٰ يُغَيِّرُوا مَا بِأَنفُسِهِمْ
“Indeed, Allah will not change the condition of a people until they change what is in themselves.”
One of the most cited Quranic principles in Islamic social thought. This verse was revealed to establish that divine favour and divine wrath are both connected to the spiritual and moral condition a community cultivates in itself.
13:28
أَلَا بِذِكْرِ اللَّهِ تَطْمَئِنُّ الْقُلُوبُ
“Verily, in the remembrance of Allah do hearts find rest.”
This verse is the Quran's most direct statement on the spiritual psychology of tranquillity. It was revealed as a response to the question of what brings peace to the human heart.