The Rebbe: "He is the head"

[In regard to the Rebbe's father-in-law, the previous Rebbe, the Rebbe wrote:]

It is incumbent upon every single one of us to know, meaning to contemplate it deeply and focus on it, that he indeed is the Leader and the head, from him and via his hand come all the physical and spiritual benefits [hashpa'os] and by making our connection to him (and he already directed in his letters how and with what to make our connection*) we are connected, and unified in the source and the source of the source until the highest of the highest, etc.

Letter of the Lubavitcher Rebbe, Gimmel Tammuz 5710 (4 months after the passing of the previous Lubavitcher Rebbe) Igros Kodesh 3:331 #635 (view)

* Hayom Yom 24 Sivan: "You ask how can you be bound (m'kushar) to me when I do not know you personally...The true bond is created by studying Torah. When you study my maamarim, read the sichos and associate with those dear to me - the chassidic community and the tmimim [students] - in their studies and farbrengens, and you fulfill my request regarding saying Tehillim and observing Torah-study times - in this is the bond."