Class One. Another Ma’amar that is (in part) a Mattan Torah Ma’amar. Why is Hashem introducing Himself as the Redeemer and not as the Creator, considering that Creation is Yesh MeAyin and a far greater miracle? The Rebbe explains because we look at things when they are actual (revealed) and not potential (hidden). Though from the moment of Creation the possibility of revealing the Ma’ala of Tachtonim was present (Birurim) but it could not be done actually until we went through galus and the Geula from Mitzrayim.