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Tikkun 56 – 4
ערוה, ‘nakedness’ is ער and וה. The negative aspect is רע, meaning ‘bad’ and וה is referring to the VH of the Holy name that represents the unification of Male and Femaile, Zeir Anpin and Malchut.
Genesis 38:7 “וַיְהִי, עֵר בְּכוֹר יְהוּדָה–רַע, בְּעֵינֵי יְהוָה; וַיְמִתֵהוּ, יְהוָה”
“And Er, Judah’s first-born, was wicked in the sight of YHVH; and YHVH slew him”
Er, ער, was supposed to be righteous but he did bad, רע in his sexual connections. Because of that he brought death on himself. YHVH is light and life and it is revealed in pure unification of the male and female. Improper and impure unifications cause a disconnection from the light of YHVH and bring the aspect of death.
On the upper level of YH יה, we also have male and female but at this level there can not be any negativity. The יה are Chokmah and Binah, Father and Mother and they are both sources of light that have no process of work or earning like the lower levels.