Sufyan on Nafs: The hardest struggle was against my own self

Waki’ reported: Sufyan al-Thawri, may Allah have mercy on him, said, “I never dealt with anything more difficult on me than myself. Sometimes it would be against me and sometimes it would be for me.”

Source: Ḥilyat al-Awliyā’ 7/5

عن وكيع عَنْ سُفْيَانُ الثَّوْرِيُّ رحمه الله قَالَ مَا عَالَجْتُ شَيْئًا قَطُّ أَشَدَّ عَلَيَّ مِنْ نَفْسِي مَرَّةً عَلَيَّ وَمَرَّةً لِي

7/5 حلية الأولياء وطبقات الأصفياء