☿Mercury
Its letter and path
Mercury rides the double letter Resh (ר), on the path that connects Hod ↔ Yesod.
Its sphere and correspondences
Its sphere is Hod (הוֹד) — Splendor / Glory, intellect & communication, in the world of Yetzirah.
Rational mind, language, analysis, intellectual understanding, magic.
Further planetary correspondences (day, metal, incense) to be added from source.
Its tarot, in this current
The card on this path is The Magician. The Golden Dawn places The Sun here instead, having assigned the letter to a different planet.
Its polarity
The letter Resh carries the polarity Clarity / Distortion (Sefer Yetzirah §37). The polarity is a property of the letter; Mercury supplies the energy that leans it one way or the other.
In the Sefer Yetzirah
The planetary assignment follows the Chaldean order set out at §§41 and 44; the polarity pair is given at §37 (Hayman critical edition).
Annotated passages to be added.
Related angels
The 72 Shem HaMephorash angels →Where the Golden Dawn differs
In this current, Mercury rides Resh (The Magician). The Golden Dawn moved Mercury to the letter Beth, and reassigned Resh to Sun ☉ — so on their tree the Resh card became The Sun.
The Golden Dawn in the lineage map →