That an unassuming seamstress could bring about the greatest educational revolution in Jewish history defies all logic. That the Bais Yaakov schools thrived and grew despite the lure of secular ideologies makes her accomplishment even more astounding. But Sarah Schnierer was a visionary who saw that formal Jewish education for women was the only way to secure the spiritual future of the Jewish people. With excerpts from her diary and her last letter to her students, Rabbi Wein paints a moving portrait of this quiet powerhouse.