For example...

For example, sin blackens the heart and removes purity from it: “What they have done has blackened their hearts.” (Surah al-Mutaffifin 83:14) Upon committing a sin, some dust settles upon the heart and if man does not remove the dust, the heart gradually becomes blocked and real blindness begins. Even any good or bad memory affects the heart and the mind. With an ugly glance, the dust of sin settles on the heart.

Then, it seems that the ears and the eyes are functioning properly but they are out of their proper function. Although the Holy Qur'an has stated the same thing about the eyes, but it is clear that this is allegorical, not particular to the eyes only. “It is not the eyes that are blind, but blind are the hearts within the breasts.” (Surah al-Haj 22:46) By virtue of the same reason, although the Almighty transmitted His…