In discussing the three levels in Ohr [1) The 10 hidden Sefiros, 2) The Sefiros as they emerge to be a source for Sefiros (KODESH) 3) As they go into Keilim] the Rebbe raises the question of the ten hidden Sefiros (genuzos) and argues that the Pardes and the Arizal (who combine to form the third shita in Kabbala about Atzilus) are in fact very similar. This class explores some of the issues about Atzilus, the three shitos and the (third shita being the combined view of the Pardes and the Arizal) and that the differences between the Pardes and the Arizal are very small and therefore these two are actually very similar. Page 504-5, NEW SV p. 565.