FOLLOW YOUR CONSCIENCE (AL-ĎAMÌR) IN ISLAM

In the name of Allah, the Most Gracious, the Most Merciful The human conscience ( al-ḍamīr ) has an important role to play in the daily life of a believer. It is a natural intuition that resides in the heart by which people can recognize good and evil. It acts as a source of guidance and moral authority for the individual, to be complemented and refined by the wisdom of divine revelation.
The definition of righteousness in Islam is to have good character, a sincere inward disposition and pure heart that motivates one to do good deeds. Through this moral faculty one can recognize sin by how it affects the heart. If a believer is uncomfortable or hesitant to perform a deed and would be ashamed for people to see him doing it, then that is a strong indication that the deed is sinful.
An-Nawwas ibn Sam’an, RadhiAllahu Anhu, reported: The Messenger of Allah, SallAllahu Alayhi Wa Sallam, said: الْبِرُّ حُسْنُ الْخُلُقِ وَالإِثْمُ مَا حَاكَ فِي صَدْرِكَ وَكَرِهْتَ أَنْ يَطَّلِعَ عَلَيْهِ النَّاسُ ‏‏ Righteousness is good character and sin is what waivers in your heart and you hate for people to find out about it . Source: Ṣaḥīḥ Muslim 2553, Grade:  Sahih Abu Umamah, RadhiAllahu Anhu, reported: A man asked the Prophet, SallAllahu Alayhi Wa Sallam,  “What is faith?” The Messenger of Allah, SallAllahu Alayhi Wa Sallam, said: إِذَا سَرَّتْكَ حَسَنَتُكَ وَسَاءَتْكَ سَيِّئَتُكَ فَأَنْتَ مُؤْمِنٌ If you are happy with your good deeds and saddened by your evil deeds, then you are a believer.
The man said, “O Messenger of Allah, what is sin?” The Prophet, SallAllahu Alayhi Wa Sallam, said: