Hawzah News Agency - Imam Ali peace be upon him says:
.إنّ أنصَحَ النّاسِ لِنَفسِهِ أطوَعُهُم لِرَبِّهِ ، وإنّ أغَشَّهُم لِنفسِهِ أعصاهُم لِرَبِّه
'He who among people is the best adviser to his own self is the one who is most obedient to his Lord, and the most deceitful of people to his own self is the one who is most disobedient to his Lord.'
Source: Nahj al-Balagha, Sermon ۸۷