Simcha Zissel Ziv threats to traditional Judaism and to strengthen the cause of the Musar movement, Simcha Zissel decided to open a school in Kelm, the Kelm Talmud Torah. At the time, Simcha Zissel was almost forty years old. The Talmud Torah opened in approximately 1865 and attracted young students, mainly thirteen and fourteen-year-olds. Simcha Zissel’s teacher – Rabbi Yisrael Salanter – had taught Simcha Zissel the importance of Musar and so the Talmud Torah aimed not only to enhance its student’s Torah knowledge but also to shape their personalities and develop their character traits using the Musar approach. Indeed, much of daily
Simcha Zissel Ziv been fluent in three orders of the Talmud, to such a level where he knew every comment of Rashi and Tosafot word for word. He was also fluent in all four divisions of the Shulchan Aruch and could locate any given Halacha within it with pinpoint precision. Simcha Zissel taught that the whole world is a classroom where one can learn to improve one’s character and increase one’s belief in God. Simcha Zissel would frequently quote Socrates, who said that "true wisdom is in knowing you know nothing." Simcha Zissel offered his students the following advice: "Take time. Be exact.