Very soon, however, the times ceased to be propitious to serene thinking and investigation of the past. Hasidism, triumphant, having conquered the whole of Russian-Poland, threatened to crush all thought and reason at the very time in which the _Kulturkampf_ was battering at the gates of the Polish ghetto. Rapoport, we have seen, contended with Hasidism in a witty pamphlet. After him, there appeared a satirist of great talent, who waged pitiless war with its partisans and with all the powers of darkness. Isaac Erter, of Przemysl (1792-1841), was the friend and disciple of Krochmal. An infant prodigy, he spent all the years of his early childhood in the exclusive study of the Law. When he was thirteen years old, his father married him to a girl of eighteen, whom he had not set eyes upon before the day of their marriage. She did not live long. Erter went on with his Rabbinic studies, and married a second time. A lucky chance brought him in contact with a Maskil who led him to the study of Hebrew grammar, and he became a devotee of the Haskalah. Encouraged by Rapoport and Krochmal, with whom he had entered into relations, he published his first satire on Hasidism. It evoked considerable comment. Persecuted by the fanatics on account of it, he could not continue to follow his vocation as teacher of Hebrew. He was obliged to quit his native city, and he went to Brody, where the circle of Maskilim welcomed him with delight. Otherwise his life at Brody was full of hardships. His wife, as courageous as she was intelligent, urged him to equip himself for some serious profession. Accordingly, at the age of thirty-three, he went to Buda-Pesth to study medicine, and five years later he returned to Brody fortified with his diploma as a physician. Thereafter he occupied an independent position, and he could dare wage uncompromising warfare with obscurantism and the mystics. He published numerous articles in the periodicals of the day. After his death, they were collected by the poet Letteris in one volume bearing the title _Ha- Zofeh le-Bet Yisraël_ ("The Watchman for the House of Israel"). Erter as satirist and critic of morals is a writer of the first order. For vivacity, his style, at once incisive and elegant, may be compared with that of his contemporaries Heine and Börne. He possesses not a few traits in common with these two writers. More serious and positive than Heine, he pursues a steady aim in his satires. Tears mingle with his laugh, and if he castigates, it is in order to chasten. More original and more poetic than Börne, he thinks clearly and to the point, and the effect of his thought is in no way impaired by his stilted mannerisms. Without bias or passion, and with fine irony, he rallies the Hasidim on their baneful superstitions, their worship of angels and demons. He criticises the ignorance and narrow-mindedness of the Rabbis, and scourges the shabby vanity of the communal representatives.