In the same year (October, 1763), he received a distinction from King Frederick, characteristic of the low condition of the Jews in Prussia. This honor was the privilege of being a protected Jew (Schutz-Jude), _i. e._, the assurance that he would not some fine day be expelled from Berlin. Hitherto, he had been tolerated in Berlin only as a retainer of his employer. The philosophical King Frederick sympathized with the antipathy of his illustrious enemy Maria Theresa to the Jews, and issued anti-Jewish laws worthy of the Middle Ages rather than of the eighteenth century, so boastful of its humanity. He wished to see the Jews of his dominions diminished in number, rather than increased. Frederick's "general privilege" for the Jews was an insult to the age. Marquis d'Argent, one of Frederick's French courtiers, who in his naïveté could not conceive that a wise and learned man like Mendelssohn might any day become liable to be driven out of Berlin by the brutal police, urged Mendelssohn to sue for the privilege of protection, and the king to grant it. However, a long time elapsed before the dry official document granting it reached him. At last Mendelssohn became a Prussian "Schutz-Jude." The philosophical "Schutz-Jude" of Berlin now won great success with a work, which met with almost rapturous admiration from his contemporaries in all classes of society. Two decades later this production was already obsolete, and at the present day has only literary value. Nevertheless, when it appeared, it justly attained great importance. Mendelssohn had hit upon the exact moment to bring it forward, and he became one of the celebrities of the eighteenth century. For almost sixteen centuries Christianity had educated the nations of Europe, governed them, and almost surfeited them with belief in the supernatural. It had employed all available means to effect its ends, and finally, when the thinkers awakened from their slumber induced by its lullabies, to inquire into the certainty secured by this announcement of salvation which promised so much, serious people said with regret--whilst sceptics chuckled with brutal delight--that it offered delusive fancies in the place of truth.