The Pregnancy is the process of purification in which the Sefirot of Zeir Anpin are sorted out from literal desolation so as to stand in proper order. Zeir Anpin’s Mental Powers in this period are at their lowest possible degree of strength. This is called Netzach-Hod-Yesod of the Mental Powers and is termed Nefesh. During Suckling there is growth in all the lights as they expand to their fullest dominion, and his Mental Powers are stronger than at first. This is called Chessed-Gevurah-Tiferet of the Mental Powers and is termed Ruach. In Maturity the Mental Powers extend in all their different aspects to govern Zeir Anpin and Nukva through the power of Chochmah-Binah-Daat. They are then at full power, and this is termed Neshamah.