Born in
Smorgon before relocating to
Ilya, he shifted from focusing on the Talmud to secular sciences and learning such as higher mathematics. Manasseh was a conservative and a humanitarian, expressing ideas of unity and cooperation in secular and Jewish learning. His writings can be seen as a blending of Talmudic thought and European enlightenment philosophy. He can be seen as a precursor of modernity among Eastern European Jews. He was a student of the
Vilna Gaon."...the Jews are divorced from real life and its practical needs and demands; that the leaders of the Jews are short-sighted men who, instead of enlightening their followers, darken their intellect with casuistic restrictions, in which each rabbi endeavors to outdo his predecessors and contemporaries. The wealthy class thinks only of its profits, and is not scrupulous with regard to the means of getting money. Even those who are honest and endeavor to help their poorer brethren do it in such an unintelligent way that they do harm rather than good. Instead of educating the children of the poor to become artisans, they add to the number of idlers, and are thus responsible for the dangerous consequences of such an education." Due his rationalist worldview, which tried to avoid nonliteral explanations (
derash) and Kabbalah, his views were often at odds with famous Jewish scholars and traditional authorities, such as
Rashi (the traditional interpreter of the
Mishnah in the
Gemara) and the
Shulchan Aruch. Sometimes he would even reject the Talmud's explanation of a given statement in the Mishna. He would have been banned if not for the assistance of an influential rabbi, Joseph Mazel of Wyazyn, who took an interest in him. The
Vilna Gaon, his teacher, found out that Manasseh had met with
Shneur Zalman of Liadi and suspected him of
Hasidic tendencies, which he denied (although he did sympathize somewhat with that movement, he was skeptical of its emphasis on
Kabbalah). The Orthodox community was suspicious of him for his interest in secular philosophy, mathematics, and astronomy, which he viewed as valuable knowledge in and of themself, and as such things that should be taught in Jewish schools as part of a good education. He planned to go to Berlin to study with
Moses Mendelssohn, but his Orthodox coreligionists intervened with the Prussian authorities to deny him a passport, so he was forced to return home, but continued to study German, Polish, natural philosophy, and mechanics. He was friends with Judah Löb of Kovno,
Samuel Eliasberg, and
Wolf Adelsohn. He died in 1831 in the
second cholera pandemic. ==Works==