أَفَلَمْ يَسِيرُوا۟ فِى ٱلْأَرْضِ فَتَكُونَ لَهُمْ قُلُوبٌ يَعْقِلُونَ بِهَآ أَوْ ءَاذَانٌ يَسْمَعُونَ بِهَا ۖ فَإِنَّهَا لَا تَعْمَى ٱلْأَبْصَـٰرُ وَلَـٰكِن تَعْمَى ٱلْقُلُوبُ ٱلَّتِى فِى ٱلصُّدُورِ Qur’an Al-Hajj (22:46)Afalam yaseeroo fee alardi fatakoona lahum quloobun yaAAqiloona biha aw athanun yasmaAAoona biha fainnaha la taAAma alabsaru walakin taAAma alquloobu allatee fee alssudoori
Lit., "whereupon they would have hearts wherewith they might understand, or ears whereby they might hear".
The word for "heart" in Arabic speech imports both the seat of intelligent faculties and understanding as well as the seat of affections and emotions. Those who reject Allah's Message may have their physical eyes and ears, but their hearts are blind and deaf. If their faculties of understanding were active, would they not see the Signs of Allah's Providence and Allah's Wrath in nature around them and in the cities and ruins if they travel intelligently?