﴿ أَفَلَمْ يَسِيرُوا۟ فِى ٱلْأَرْضِ فَتَكُونَ لَهُمْ قُلُوبٌۭ يَعْقِلُونَ بِهَآ أَوْ ءَاذَانٌۭ يَسْمَعُونَ بِهَا ۖ فَإِنَّهَا لَا تَعْمَى ٱلْأَبْصَٰرُ وَلَٰكِن تَعْمَى ٱلْقُلُوبُ ٱلَّتِى فِى ٱلصُّدُورِ ﴾

“Have they, then, never journeyed about the earth, letting their hearts gain wisdom, and causing their ears to hear? Yet, verily, it is not their eyes that have become blind - but blind have become the hearts that are in their breasts!”

Before God, people with eyes are those who look at things in order to learn a lesson or draw wisdom from them. Those who see things without learning a lesson from them, are blind in the eyes of God. Their seeing is like that of animals, not human beings. God has spread on the earth innumerable lesson-giving things. Among them are the ancient memorials left behind by past nations. These nations once enjoyed pomp and power, but the signs of their existence today are nothing but a few dilapidated ruins. This reminds everybody of the fate he is finally going to meet. But when people lose the mind’s eye, the eyes on the face will fail to show them anything meaningful.