By the age of 30, he had written commentaries on most of the Talmud, and soon after he was a major voice in mediating the controversy over Maimonides ’ writings that threatened to divide the Jewish community.
नाख़्मानदीज़ का काटालोनिया के यहूदी समुदाय पर इतना प्रभाव था कि राजा जेम्स प्रथम भी कई राष्ट्रीय मसलों पर उससे सलाह लेता था ।