This deluxe Berkowitz Family Yomtov Edition discusses the concept of Mushba Ve'Omed Me'Har Sinai - the idea that at Matan Torah, all  Jews of every generation were sworn to uphold all the commandments of the Torah.  We will discuss the various opinions of the rishonim as to the source of this promise in Chumash.  Also explores the essence of  this promise and how it is halachically binding.