"It is not people's eyes that are blind, but their hearts within their breasts." (Qur'an 22:46)
فَإِنَّہَا لَا تَعۡمَى ٱلۡأَبۡصَـٰرُ وَلَـٰكِن تَعۡمَى ٱلۡقُلُوبُ ٱلَّتِى فِى ٱلصُّدُورِ
Ibn al-Qayyim said:
"The true slave is the one who fears the death of his heart, not the death of his body. Yet most people fear the death of their bodies and do not care about the death of their hearts."
Gems From the Quran