«فَكَانَ لِمَحَاسِنِ آلَاتِهِ يُلْبَسُ عَلَى عَلَّاتِهِ»
Because of the excellence of his abilities, his weaknesses were obscured.
Maḥāsin means merits; ʿallāt means faults or deficiencies. Yulbas suggests confusion or concealment, making shortcomings harder to discern.
Abū Zayd's talents can impress an audience so strongly that other issues recede. Eloquence deserves appreciation, but eloquence alone is not proof of truth.