Hawzah News Agency - Ahmad ibn ’Idris has narrated from Muhammad ibn ‘Abd al-Jabbar, from one of our people in a marfu’ manner that Abu 'Abdillah (al-Sadiq)  was asked,

مَا الْعَقْلُ قَالَ مَا عُبِدَ بِهِ الرَّحْمَنُ وَاكْتُسِبَ بِهِ الْجِنَانُ قَالَ قُلْتُ فَالَّذِي كَانَ فِي مُعَاوِيَةَ فَقَالَ تِلْكَ النَّكْرَاءُ تِلْكَ الشَّيْطَنَةُ وَهِيَ شَبِيهَةٌ بِالْعَقْلِ وَلَيْسَتْ بِالْعَقْلِ.

'What is intellect (al-'Aql)?'. He said, ‘It is what someone worships ar-Rahman with and attains paradise.’ I then asked, 'What was the thing within Mu'awiya?'. He replied, ‘That was heinousness, that was devilry and it is similar to the intellect but it is not intellect.’

Al-Kāfi, v.1