Page 23 (-25).
This Shiur explores levels in Ohr Ein Sof and explains (in order and from the top down) the various ‘Havdalos’ (Tzimtzumim) that happen even before the first Tzimtzum (separates the Iggul from the Kav).
1) Etzem of Ein Sof which is not even Giluy, 2) Giluy to Himself, this has Sfiros within itself (that act as the Zulas, so the light could shine), this is the level of Sfiros Ein Keitz, 3) after the Ratzon there are (the selection of) the Ten (hidden) Sfiros, but the light is still ‘Iggul’ and not Kav, 4) as a result of the Tzimtzum Ha’Rishon, the light changes categorically: from Iggul to Kav.
There are three effects of the first Tzimtzum: 1) the Ohr and Keli are separated and when they are reunited it is as two separate things getting together, 2) the Keli emerge as entities onto themselves, 3) The ohr has changed (the Bekia etc.) to be a Kav that can in theory go into a Keli.
