Sefer Etz Chaim and Tanya

Both texts identify Netzach and Hod with kidneys and reproductive function ('klayot yo'atzot' and 'trayim bi'in'). Text 1 emphasizes structural duality (Netzach and Hod as 'two halves' separated from outside, united from inside; their relationship to the feminine principle; connection to YHVH and Adonai names). Text 2 emphasizes their functional role in processing intellect from the brain into something the recipient can comprehend—the mechanism of transmission and modification of consciousness ('dal'ut' to 'gasut'). Text 1 focuses on geometric-anatomical structure and theurgic names; Text 2 focuses on epistemological function. No contradiction, but distinct interpretive priorities.