✅ Answer: Please refer to the following narrations:

1⃣عَنْ یَحْیَی الطَّوِیلِ صَاحِبِ الْمُقْرِی عَنْ أَبِی عَبْداللَّه قَالَ: حَسْبُ الْمُؤْمِنِ غَیْراً إِذَا رَأَی مُنْکَراً أَنْ یَعْلَمَ اللَّهُ عَزَّوَجَلَّ مِنْ قَلْبِهِ إِنْکَارَهُ.

Caffeine

📚 *Al-Kafi*, Vol. 5, p. 60

Imam al-Sadiq (peace be upon him) said: 'For the believer’s sense of honor, it is enough that when they see an evil deed, Allah Almighty knows that they reject it from their heart!'

2⃣عَنْ مُحَمَّدِ بْنِ جَعْفَرِ بْنِ مُحَمَّدٍ عَنْ أَبِیهِ عَنْ آبَائِهِ وَ عَنِ الْمُجَاشِعِیِّ عَنِ الرِّضَا عَنْ أَبِیهِ عَنْ آبَائِهِ قَالَ: قَالَ رَسُولُ اللَّهِ یَأْتِی عَلَی النَّاسِ زَمَانٌ یَذُوبُ فِیهِ قَلْبُ الْمُؤْمِنِ فِی جَوْفِهِ کَمَا یَذُوبُ الْآنُکُ فِی النَّارِ یَعْنِی الرَّصَاصَ وَ مَا ذَاکَ إِلَّا لِمَا یَرَی مِنَ الْبَلَاءِ وَ الْأَحْدَاثِ فِی دِینِهِمْ وَ لَا یَسْتَطِیعُ لَهُ غَیْراً.

📚 *Al-Amali al-Tusi*, Vol. 2, p. 132

The Messenger of Allah (peace be upon him) said: 'There will come a time for the people when the heart of the believer will melt inside, just as lead melts in fire! This will happen because of the calamities and innovations that their religion will witness, but they will be unable to change them.'

3⃣ قَالَ أَمِیرُالْمُؤْمِنِینَ إِنَّمَا یَجْمَعُ النَّاسَ الرِّضَا وَ السَّخَطُ فَمَنْ رَضِیَ أَمْراً فَقَدْ دَخَلَ فِیهِ وَ مَنْ سَخِطَهُ فَقَدْ خَرَجَ مِنْهُ.

📚 *Al-Mahasin*, p. 262

Imam Ali (peace be upon him) said: 'Indeed, people are brought together by approval and disapproval. Whoever is pleased with something has certainly entered into it, and whoever is displeased with it has certainly stayed away from it!'

3⃣عَنْ أَبِي عَبْدِاَللَّهِ عَلَيْهِ اَلسَّلاَمُ قَالَ قَالَ أَمِيرُ اَلْمُؤْمِنِينَ عَلَيْهِ اَلسَّلاَمُ: أَدْنَى اَلْإِنْكَارِ أَنْ يُلْقَى أَهْلُ اَلْمَعَاصِي بِوُجُوهٍ مُكْفَهِرَّةٍ.

📚 *Al-Tehzhib*, Vol. 6, p. 177

Imam Ali (peace be upon him) said: 'The least rejection of a sin is to meet the people of sin with a scowling and displeased face!'

4⃣عَنْ عَبْداللَّهِ بْنِ مَیْمُونٍ الْقَدَّاحِ عَنْ أَبِی عَبْدِ اللَّهِ عَنْ أَبِیهِ عَنْ جَدِّهِ عَلِیِّ بْنِ الْحُسَیْنِ قَالَ: قَالَ مُوسَی بْنُ عِمْرَانَ یَا رَبِّ مَنْ أَهْلُکَ الَّذِینَ تُظِلُّهُمْ فِی ظِلِّ عَرْشِکَ یَوْمَ لَا ظِلَّ إِلَّا ظِلُّکَ فَأَوْحَی اللَّهُ إِلَیْهِ الطَّاهِرَةُ قُلُوبُهُمْ وَ الْبَرِیئَةُ أَیْدِیهِمُ إِلَی أَنْ قَالَ وَ الَّذِینَ یَغْضَبُونَ لِمَحَارِمِی إِذَا اسْتُحِلَّتْ مِثْلَ النَّمِرِ إِذَا جُرِحَ.

📚 *Al-Mahasin*, p. 16

Imam Zayn al-Abidin (peace be upon him) said: 'Musa ibn Imran (peace be upon him) asked: 'O Lord! Who are the people whom You will place in the shadow of Your throne on the day when there will be no shade except Your shade?' Allah Almighty revealed to him: 'They are the people whose hearts are pure and clean, and their hands are free from corruption... and they are those who, like a wounded leopard, become angry when My forbidden things are considered lawful!'

✅ Based on the above narrations and others, those with pure and clean hearts, when they see or hear an evil deed or sin, their hearts immediately reject it, and they become disgusted by it. As a result, their faces frown and show anger, and their displeasure and dissatisfaction are apparent both in their appearance and their hearts.

Therefore, if a person laughs or feels joy and excitement upon seeing or hearing an evil deed or sin, it indicates a flaw and darkness in their heart. Despite knowing and believing that the act is sinful, their heart, which according to the narrations is the leader of their limbs and faculties, does not issue the necessary command for rejection, anger, or a scowling face. Instead, it directs them to laugh, smile, and eagerly pursue the sin!

For this reason, it is essential for the individual to urgently take action to remove the flaws, darkness, and problems in their heart so that the commands issued by the heart to their limbs and faculties can be corrected.

✅ Whoever laughs upon hearing insults, swearing, offensive speech, or gossip among people, or enjoys clips containing sins, should know that a great calamity has befallen their heart, and they must think about treating it.

اللَّهُمَّ صَلِّ عَلَی مُحَمَّدٍ وَ آلِ مُحَمَّدٍ وَ عَجِّلْ لِوَلِیِّکَ الْفَرَجَ وَ الْعَافِیَةَ وَ النَّصْر