لَيْسَ شَيْءٌ إِلَّا وَ لَهُ حَدٌّ قَالَ قُلْتُ جُعِلْتُ فِدَاكَ فَمَا حَدُّ التَّوَكُّلِ قَالَ الْيَقِينُ قُلْتُ فَمَا حَدُّ الْيَقِينِ قَالَ أَلَّا تَخَافَ مَعَ اللَّهِ شَيْئاً.
‘There is nothing without a limit.’ I (the narrator) then asked, ‘May Allah keep my soul in service for your cause, what is the limit of trust?’ The Imam said, ‘It is certainty.’ I then asked, ‘What is the limit of certainty?’ The Imam said, ‘It is when, with having Allah on your side, you do not fear anything.’”