'Iblis[Satan] may Allah's curse be on him says to his troops, 'If I can gain mastery over three things in man, I will no longer care how much good he does for it will not be accepted from him: if he overrates his good deeds, forgets his sins, and is overcome by self-admiration.'
Imam Ja'far ibn Muhammad al-Sadiq [as]
al-Khisal, p. 112, no. 86
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