AssalamuAlaykum
Narrated Abu Umamah in Ahmed: The Messenger
said: When your piety pleases you and your wrongdoing saddens you then you are a Believer. Someone asked, "Oh Messenger of Allah! What is a sin?", He said, "When anything pricks your conscience then (know it is a sin and) give it up."
I think thats an amazing Hadeeth. May Allah
save us all from wrongdoing and haram. Ameen.
WassalamuAlaykum