Tzimtzum HaRishon, the whole process. The Tzimtzum before Tzimtzum Harishon, that affects “Ohr HaMair” in which the first tzimtzum occurs. The Tzimtzum’s dual affect On the Kelim (Reshimu) to become something separate from the Ohr; The Ohr is Bittulled in Atzmus and must be “Bokea” (break through) the Tzimtzum and thus comes as a new Metzius. page 465-6, 467-8. NEW SV p. 612-13, 615-17.
