90 – Muhammad ibn al-Husayn related that ʿAbd Allah ibn Muhammad used to say, “If a man’s intuition brings you no benefit, his very person will be of no benefit to you.”

91 – One of the sages said, “He who takes no profit from his own surmise will never profit from his reason,” and he went on to recite—in the wāfir metre:
I saw Abū al-Walīd at Jamʿ one early dawn—
grey locks upon him, his youth already gone;
Yet under that grey hair lies judgment, sharp and grave:
when he makes a surmise it unsettles—or it hits the mark.