This shiur compares the Ten Commandments as they appear in Devarim with their form in Sefer Shemot. Most significantly, there appears to be an entirely different explanation for the commandment of Shabbat. Is Moshe in his "repetition" deviating from the original commandments from the Revelation at Sinai? Why is he quoting from parashat Mishpatim instead of from parashat Yitro? What is the purpose of the disparity between Shemot and Devarim?