When you know Alchemy and Kabbalah, you understand that the most difficult work that we need to perform is related with the kidneys. Of course Hod and Netzach are related with Jezebel, the inferior emotional center and the mind, respectively, but these two Sephiroth also relate to the kidneys, which are those organs that give sexual strength to Yesod.
“Notwithstanding I have a few things against thee, because thou sufferest that woman Jezebel, which calleth herself a prophetess, to teach and to seduce my servants to commit fornication, and to eat things sacrificed unto idols [the goyim or egos of the mind]. And I gave her space to repent of her fornication; and she repented not. Behold, I will cast her into a bed, and them that commit adultery with her into great tribulation, except they repent of their deeds. And I will kill her children with death; and all the churches shall know that I am he [the glorified son of the dawn – Hillel Ben Shachar – הילל בן־שחר] which searcheth the kidneys and hearts: and I will give unto every one of you according to your (sexual) works.” – Revelation 2: 20-23“