Mitzvas Shoresh Mitzvas HaTefilla, Perek 16- 17, Class 74.

Mitzvas Shoresh Mitzvas HaTefilla, Perek 16- 17, Class 74.
This class is on the end of Perek 16 and all of Perek 17.
The mechanism of prayer (davening) to change the physical world is reviewed in this class with a couple new concepts added (cross reference to earlier classes on Perek 11). 
The details of the “engineering” of this process from the upper worlds to lower worlds is achieved starting with two stages:
1. Mesirus nefesh (yud keh) to bring “Ein Sof” into the process drawing from Atzilus (the upper world) and
2. Tefillah (vav keh) bringing down the “Ohr Ein Sof” through the appropriate kavanah in “Shemona Esrei” to impact the lower world.  The specific aspects of this process are broken down in detail in this class.
Two new points added beyond the earlier segments of ma’amar: 1. What’s the difference between “mesirus nefesh b’echod” and “b’chol meodcha”.  2. Is “Kriyah Shema” happening in the world of “olam ha Beriyah” or is it beyond worlds because, as the Rebbe explains, “Kriyah Shema” is mesirus nefesh in which there is no division of worlds.  

Link to entire Ma’amar
https://insidechassidus.org/maamarim/maamarim-of-the-tzemach-tzedek/derech-mitzvosecha-shoresh-mitzvos-hatefilla/

Link to this Perek
https://insidechassidus.org/mitzvas-shoresh-mitzvas-hatefilla-perek-16