esteem in which Falk was held by the Jewish community, including the Chief Rabbi and the Rabbi of the new Synagogue, appears to have roused the resentment of his co-religionist Emden, who denounced him as a follower of the false Messiah and an exploiter of Christian credulity.
Falk [he wrote in a letter to Poland] had made his position by his pretence to be an adept in practical Cabala, by which means he professed to be able to discover hidden treasures; by his pretensions he had entrapped a wealthy captain whose fortune he had cheated him out of, so that he was reduced to depending on the Rabbi's charity, and yet, despite this, wealthy Christians spend their money on him, whilst Falk spends his bounty on the men of his Brotherhood so that they may spread his fame.
In general Falk appears to have displayed extreme caution in his relations with Christian seekers after occult knowledge, for the Jewish Encyclopædia goes on to say: "Archenholz mentions a royal prince who applied to Falk in his quest