The Rema's prolific works of scholarship and innovations in halacha come into focus in this informative lecture. Rabbi Wein recounts the events in the Jewish world that gave rise to the definitive halachic work, the Shulchan Aruch, and shows how the Rema, in his characteristic modesty, chose to add notes to it instead of publishing a new work of his own. Yet even the most humble of rabbis cannot avoid controversy, and Rabbi Wein discusses the Rema's lesser known work, Toras Ha Olam, which deals with the hotly contested issue of secular philosophy.