Due to Rav Brevda's current health, this shiur was presented in his home. The intro and closing are specific to our listeners, while the main body of the shiur was recorded Motzei Shabbos for a Kollel in Eretz Yisroel. This is why you will hear a diffence in the volume after a few minutes then again at the conclusion. The Rov explains the importance of this shiur and why it needed to be done this way. Your attention is appreciated.