During the an outbreak of the Black Death, when persecution of Jews was widespread, ben Joshua was forced to flee when an angry mob attacked the Jewish community there.
He subsequently lived in Barcelona, where he wrote a commentary on the medieval philosophical tale Hayy ibn Yaqdhan, in which he called to appropriate autodidacticism as a pedagogical program.
Moses was an admirer of Averroes; he devoted a great deal of study to his works and wrote commentaries on several of them.
He rejected the belief in miracles, instead believing they could be explained, and defended man's free will by philosophical arguments.
[2] 3-ـ كتاب كمال النفس لــ موسى النربونى ...ترجمة ودراسة نقدية (حسام الدين العفيفى أحمد محمود سليمان)...رسالة ماجستير ــ جامعة الأزهر2007 ـ كتاب كمال النفس لــ موسى النربونى ...ترجمة ودراسة نقدية (حسام الدين العفيفى أحمد محمود سليمان)...رسالة ماجستر ــ جامعة الأزهر 2007م