He was held in high esteem on account of his religious and kabbalistic knowledge; and, as the brother-in-law of Joseph Ergas, the well-known anti-Sabbatean, he had great influence over the Jews of Leghorn, urging them to believe in Sabbatai. Even later, in 1667, when Shabbethai's apostasy was rumored, Pinheiro, in common with numerous other adherents of Zevi, still believed him to be the messiah.
Pinheiro was "the center of the Shabbatean group in Livorno," and he maintained a correspondence with Shabbetai Zevi over the years, after his return from Constantinople to Livorno in 1667. He spent some time with Sabbatai in Constantinople in 1666-67. Nathan stayed at Pinheiro's house on his visit to Italy in 1668.
- Scholem, Gershom. "Pinheiro, Moses." Encyclopaedia Judaica. Ed. Michael Berenbaum and Fred Skolnik. 2nd ed. Vol. 16. Detroit: Macmillan Reference USA, 2007. 168-169. Gale Virtual Reference Library. Web. 15 Feb. 2016.
- Grätz, Gesch. 3d ed., x. 190, 204, 225, 229, 312