Chaim of Volozhin (also known as Chaim ben Yitzchok of Volozhin or Chaim Ickovits; January 21, 1749 – June 14, 1821) was a rabbi, Talmudist, and ethicist. Popularly known as "Reb Chaim Volozhiner" or simply as "Reb Chaim", he was born in Volozhin (a.k.a. Vałožyn or Valozhyn) when it was a part of the Polish–Lithuanian Commonwealth. He died there while it was under the control of the Russian Empire. The title of his major work is . Student of the Vilna Gaon Both Chaim and his elder brother Simcha (d. 1812) studied under Rabbi Aryeh Leib ben Asher Gunzberg, the author of the Shaagas Aryeh, who was then rabbi of Volozhin, and afterward under Rabbi Raphael ha-Kohen, (the author of the Toras Yekusiel), later of Hamburg. Aged 25, Chaim became a disciple of Vilna Gaon. Using his new teacher's method, he began his studies anew, returning to Torah, Mishnah, Talmud, and Hebrew grammar. His admiration for the gaon was boundless, and after his death Chaim virtually acknowledged no superior (see Heschel Levin's "Aliyyot Eliyahu", pp. 55–56, Vilna, 1889 ). Establishing the Volozhin Yeshiva It was with the view of applying the methods of the Vilna Gaon that Chaim founded the Volozhin yeshiva, then called Yeshivat Etz Chaim, in 1795, a yeshiva that remained in operation for almost 100 years until it was closed in 1892. The yeshiva became the "mother of all Lithuanian-style yeshivas". He began with ten pupils, young residents of Volozhin, whom Chaim maintained at his own expense. It is related that his wife sold her jewelry to contribute to their maintenance. The fame of the institution spread, and the number of its students increased, necessitating an appeal to which the Jews of Russia generously responded. Rabbi Chaim lived to see his yeshiva housed in its own building, and to preside over a hundred disciples ("Chut ha-Meshullash," responsum No. 5, published by his great-grandson ). He saw one of his students establish his own yeshiva, Mir yeshiva. Chaim continued to teach the Vilna Gaon's study method of penetrating analysis of the Talmudic text, seeking to elicit the intent and meaning of the writing of the Rishonim. This approach was followed by all the great Lithuanian yeshivas, such as Slobodka yeshiva, Mir yeshiva, Ponevezh yeshiva, Kelm yeshiva, Kletsk yeshiva, and Telz yeshiva. Works Chaim's major work is the Nefesh Ha-Chaim ("Living Soul"). It deals with complex understandings of the