 With great subtlety he obtained influence over two Polish rabbis who, as delegates of the Jews of eastern Europe, had come to Constantinople in order to investigate the claims of Sabbatai, and exercised such influence over them as to lead them to declare themselves his adherents.The conversion of Sabbatai to Islam put an end to the career of Yachini as an agitator.Notwithstanding his activity in this direction, he found time for literary work, which is of such merit that, had it not been for the deceptions he practised, it would have secured him an honorable place among the Jewish scholars of his time.