Hayom Yom 6 Menachem Av, Class Two.One Havaya brings a second Havaya that brings a third Havaya.But the point is עושה שמים וארץ the world must be.

Class Ten. Page 60-1. Even when the Rabbeiim needed no one for gashmiyus support they were the לית לי’ מגרמי’ כלום who needed to be enriched by their Chassidim. This created the connection between the Rebbe and the Chassidim.  

Class One. Page 97-8. Avrohom, even as a King traveled to people to do his work, the lesson for us.