Class Seven. Page 137. Yehoshua during Moshe’s lifetime was like Moshe, this incredible anomaly is what made Yehoshua a נער in the favorable sense.
Class Eight. Page 137-9. This idea is compared to the concept of תענוג הבד הוא תענוג האדון ממש, the total subservience of the slave to the master, that his master’s pleasure becomes the slave’s pleasure. The Rebbe goes on to say, that since this Ma’amar reached us, this means that we have some possibility to do this somewhat.
Class Nine. Page 139-141. The Rebbe argues that this level of Bittul is at least achievable on the level of action through Kabalas Ol Malchus Shamayim.