Difference between a fault and sin:

Difference between a FAULT and SIN.

Fault means any action that takes place unintentionally and sin is with intention.
To understand what is SIN we must know the difference between a FAULT and SIN.
Fault means any action that takes place unintentionally and sin is with intention.
Last Messenger and Prophet (PBUH) of Allah The Almighty said:
“Righteousness is good morality and sin is that which causes discomfort (or pinches) within your soul and which you dislike people to become informed of.”
(Sahih Muslim)
AND Allah the Almighty said in the Holy Quran.
“Those who avoid great sins and shameful deeds, only (falling into) small faults,- verily thy Lord is ample in forgiveness. He knows you well when He brings you out of the earth, And when ye are hidden in your mothers' wombs. Therefore justify not yourselves: He knows best who it is that guards against evil.”
[Holy Quran, Al-Najm 53:32]
“And he who does an atom’s weight of good will see it. And he who does an atom’s weight of evil will see it.”
[Holy Qur’an, 99:7-8]
“Is he who is a believer like unto him who is a sinner? They are not alike! For those who believe and do righteous works, for them are Gardens of Retreat, a welcome (in reward) for what works they did. And as for those who do evil, their abode is the Fire. Whenever they wish to leave, they will be forced back into it, and it will be said to them: Taste the torment of the Fire which you used to reject.”
[Holy Qur’an, 32:18-20]