The Musar movement (; also spelled Mussar) is an ethical, educational, and cultural movement in Judaism that developed in 19th-century Lithuania, particularly among Orthodox Lithuanian Jews. () is derived from Proverbs 1:2, wherein the author of the book of Proverbs uses the term to describe moral behavior, instruction, and discipline, with an emphasis on educating oneself about how to act properly. The term was used by the originators of the Musar movement to convey teachings regarding ethical and spiritual paths found in the Musar literature (). The Musar movement made significant contributions to the Musar literature and Jewish ethics. The movement was revived in the 21st century among Jews of all denominations, particularly in Canada and the United States.

Although the modern Mussar movement is associated with Rabbi Yisroel Salanter, the broader tradition of Mussar literature long predated the nineteenth century. Ethical and spiritual self-development themes appeared in earlier Jewish works, including Pirkei Avot, Bahya ibn Paquda's Duties of the Heart, Maimonides' Shemoneh Perakim, and later medieval and kabbalistic ethical writings. According to later Mussar writers, Rabbi Salanter's contribution was to systematize these earlier traditions into a structured movement focused on ethical self-improvement and character development.

Early leaders

The founding of the Musar movement is attributed to Rabbi Yisrael Lipkin Salanter (1810–1883), although the roots of the movements drew on ideas previously expressed in classical rabbinical literature.

Rabbi Yisrael Salanter

Yisrael Lipkin Salanter, a promising young rabbi with exceptional knowledge of Jewish law living in Salantai, Lithuania, was initially inspired to dedicate his life to the cause of spreading Musar by his teacher Rabbi Yosef Zundel Salant (1786–1866). Zundel Salant was a student of rabbis Chaim Volozhin and Akiva Eiger, whose profoundly good-hearted and humble behavior and simple lifestyle attracted Yisrael Salanter's interest. Zundel Salant was said to urge Salanter to focus on Musar.

Widely recognized as a rabbi of exceptional talent, Yisrael Salanter became head of a yeshivah in Vilna, where he quickly became well known in the community for his scholarship. He soon resigned this post to open up his own yeshiva, in which he emphasized moral teachings based on the ethics taught in traditional Jewish rabbinic works, especially Musar literature. Salanter referred to his approach as the Musar approach, using the Hebrew word for ethical discipline or correction.

In seeking to encourage the study of Musar literature, Salanter had three works of Musar literature republished in Vilna: Mesillat Yesharim by Moshe Chaim Luzzatto, Tikkun Middot ha-Nefesh by Solomon ibn Gabirol, and Cheshbon Ha-Nefesh by Menachem Mendel Lefin.

He particularly concentrated on teaching Jewish business ethics, saying that just as one checks carefully to make sure his food is kosher, so too should one check to see if his money is earned in a kosher fashion.

Rabbi Salanter set an example for the Lithuanian Jewish community during the cholera epidemic of 1848, ensuring that necessary relief work on Shabbat for Jews was done by Jews (despite the ordinary prohibition against doing work on Shabbat), and ordering Jews whose lives were in danger to eat rather than fast on the fast day of Yom Kippur.

In 1848, the Czarist government created the Vilna Rabbinical School and Teachers' Seminary. Salanter was identified as a candidate to teach at the school, but he refused the position and left Vilna. Salanter moved to Kovno, where he established a Musar-focused yeshiva at the Nevyozer Kloiz.

In 1857, he moved to Germany. By this time, his own students from Kovno had begun to set up their own yeshivot in Kelme, Telz, and elsewhere. Salanter later helped to found another institution, the Kovno Kollel.

In Germany, Salanter founded a periodical entitled Tevunah, dedicated in part to Musar. Many of Rabbi Salanter's articles from Tevunah were collected and published in Imrei Binah (1878). His Iggeret ha-Musar ("ethical letter") was first published in 1858 and then repeatedly thereafter. Many of his letters were published in Or Yisrael ("The Light of Israel") in 1890 (edited by Rabbi Yitzchak Blazer). Many of his discourses were published in Even Yisrael (1883).

Salanter also wrote "An Essay on the Topic of Reinforcing Those who Learn our Holy Torah," published by his students in a collection of essays titled Etz Pri. This essay is important for its exploration of the concept of the subconscious, well before the concept was popularized by Sigmund Freud. In Salanter's essay, the concept of conscious ("outerness" [chitzoniut]) and subconscious ("innerness" [penimiut]) processes and the role they play in the psychological, emotional and moral functioning of man is developed. Salanter explains that it is critical for a person to recognize what his subconscious motivations [negiot] are and to work on understanding them. He also teaches that the time for a person to work on mastering subconscious impulses was during times of emotional quiet, when a person is more in control of his thoughts and feelings. Salanter stresses that when a person is in the middle of an acute emotional response to an event, he is not necessarily in control of his thoughts and faculties and will not have access to the calming perspectives necessary to allow his conscious mind to intercede.

Scholar Hillel Goldberg and others have described Salanter as a "psychologist" as well as a moralist.

Second generation

After Salanter's death, the Musar movement was led by his disciples, who developed the movement in various ways.

Salanter's eldest disciple, Rabbi Simcha Zissel Ziv, directed yeshivas in Kelme and Grobin. These yeshivas broke with established models of yeshivot in a number of ways, especially by devoting significant time to the study of musar and by teaching general, non-Jewish studies. Simcha Zissel also wrote discourses that deeply engaged questions of moral virtue and gave particular attention to the importance of love for others.

A second student of Salanter's, Rabbi Yitzchak Blazer became the chief rabbi of St. Petersburg in 1861–1862; he later led the Kovno kollel. Blazer also published many of Salanter's writings.

A third leading disciple of Salanter, Rabbi Naftali Amsterdam, became the chief rabbi of Helsinki.

Third generation

In the following generation, leaders of the Musar movement included Zissel's student Nosson Tzvi Finkel of Slabodka, and Rabbi Yosef Yozel Horwitz of Novaradok. The schools founded by these two men became the largest and most influential schools of Musar. The Slobodka school founded by Finkel became especially influential, but the Novaradok school also gained a significant following. Louis Jacobs has described the difference between these two schools as follows:

Controversy

In later years, opposition to the Musar movement developed in some segments of the Orthodox community. Many opposed the new educational system that Yisrael Salanter set up, and others charged that deviations from traditional methods would lead to assimilation as expected in classical German Reform Judaism.

In 1897, Eliezer Gordon, of the Telshe yeshiva, hired a new Musar supervisor, Rabbi Leib Chasman, who instituted a very strict Musar regime in the yeshiva. Many of the students opposed this approach, which caused dissent among the student body. At the same time, dissent against Musar also broke out at the Slobodka Yeshiva. A group of Lithuanian rabbis then published a declaration in the Hebrew newspaper Ha-Melitz in opposition to the study of Musar. According to the YIVO Encyclopedia of Jews in Eastern Europe,