Hawzah News Agency – Imam al-Sadiq peace be upon him says:
إذا رَأيتُمُ العَبدَ مُتَفَقِّداً لِذُنوبِ (النّاسِ) ناسِياً لِذُنوبِهِ، فَاعلَموا أنَّهُ قَد مُكِرَ بِهِ.
‘When you see a man inspecting other people’s sins and forgetting his own sins, then know that he is deluding himself.’
Source: Mustatrafat ala-Sar’ir, p. 48, no. 7