Dhu al-Nun said: Three of the signs of faith are: taking the heart’s interest in the misfortunes of Muslims, offering advice to them, avoiding the bitterness of their suspicions, and guiding them to their interests, even if they are ignorant of it and hate it. Ahmad ibn Ahmad ibn Salamah said: Dhu al-Nun advised me, “Do not let people’s faults distract you from your own faults. You are not a watchdog over them.” Then He said, “The most beloved of God’s servants to God Almighty is the one who is most sensible of Him.” Rather, the evidence of a man’s perfect intellect and his humility in his mind is his good listening to the hadith, even if he knows it, his speedy acceptance of the truth even if it comes from someone who is lower than him, and his admission of error when he brings it.