أَفَلَمۡ يَسِيرُواْ فِي ٱلۡأَرۡضِ فَتَكُونَ لَهُمۡ قُلُوبٞ يَعۡقِلُونَ بِهَآ أَوۡ ءَاذَانٞ يَسۡمَعُونَ بِهَاۖ فَإِنَّهَا لَا تَعۡمَى ٱلۡأَبۡصَٰرُ وَلَٰكِن تَعۡمَى ٱلۡقُلُوبُ ٱلَّتِي فِي ٱلصُّدُورِ ٤٦
So have they not traveled through the earth and have hearts by which to reason and ears by which to hear? For indeed, it is not eyes that are blinded, but blinded are the hearts which are within the breasts.
Translation: Saheeh International (English)
Each word's meaning and sound
Did these people who reject what the Messenger (peace be upon him) brought not travel in the land, to see the remains of these destroyed cities, so that they would reflect with their minds to take heed and so that they would to accept their stories to learn from them? It is established that blindness is not blindness of eyesight, but rather the blindness which is destructive is blindness of insight, where such a person does not reflect or take lessons.
Al-Mukhtasar in interpreting the Noble Quran