Musar movement
The Musar movement (Hebrew: תְּנוּעַת הַמוּסָר, romanized: tnūʿat ha-Mūsar; also spelled Mussar) is an ethical, educational, and cultural movement in Judaism that developed in 19th-century Lithuania, particularly among Orthodox Lithuanian Jews. Musar (Biblical Hebrew: מוּסָר) 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.