The Prophet Muhammad :saw: said:
“Doing good is having good manners. Doing evil is what troubles you inside and what you would not like others to know about.”
[Imam Bukhari’s Book of Muslim Morals and Manners]
“Bad and good are not equal, even though the abundance of the bad may dazzle you; so fear God, O people of understanding, that you may prosper!”
[The Holy Quran, AL-MAEDA (THE TABLE, THE TABLE SPREAD): 5:100 ]