While the Brisker method has won acceptance in almost all yeshivas today, it has its opponents. These include Rabbi Avraham Yeshayahu Karelitz (1878–1953) (known as the "Chazon Ish"), who felt that often the existing approach to a Talmudic portion was sufficient. Additionally, the Brisker method is not widely used in modern yeshivas which stem from the Mirrer Yeshiva (originally from Russia), which instead tend to stress single, unifying themes throughout Talmudic concepts, often focusing on only one "Rishon" if it is seen as the most "truthful" approach to a Talmudic passage.