قَالَ أَبُو عَبْدِ اللَّهِ ع أُصُولُ الْكُفْرِ ثَلَاثَةٌ الْحِرْصُ وَ الِاسْتِكْبَارُ وَ الْحَسَدُ فَأَمَّا الْحِرْصُ فَإِنَّ آدَمَ ع حِينَ نُهِيَ عَنِ الشَّجَرَةِ حَمَلَهُ الْحِرْصُ عَلَى أَنْ أَكَلَ مِنْهَا وَ أَمَّا الِاسْتِكْبَارُ فَإِبْلِيسُ حَيْثُ أُمِرَ بِالسُّجُودِ لآِدَمَ فَأَبَى وَ أَمَّا الْحَسَدُ فَابْنَا آدَمَ حَيْثُ قَتَلَ أَحَدُهُمَا صَاحِبَهُ[1].
“Abu ‘Abd Allah (a.s.) has said, ‘The roots of disbelief are three: Greed, Self- aggrandizement and Envy. It was greed that led Adam to eat from the prohibited tree. It was Self-aggrandizement that led Satan to refuse prostration before Adam. Envy led one of the sons of Adam to murder his own brother.’”