Imaam Ibn al-Qayyim رحمه
الله رحمة واسعة said:
“From the signs that (the heart is dead), is that the
possessor of such a heart does not feel pain and hurt when he commits evil deeds,
and his ignorance of the truth and his false beliefs do not cause him to feel
any pain.”
Ighaatul-Lahfaan fee Masaayid Ash-Shaytaan 1/113.
Daar al-‘Ilm al-Fawaaid, 2nd edition
Translation: MarkazMuaadh.com