They represent the pillars of Hermes and Solomon as found in the Neophyte Ritual of the Golden Dawn duality in greatest severity. The two pillars of six flames are each 60, for the flame is a yod. These total 120, which is the value of Samekh Mem Kaph - the full spelling of SMK, or Samekh.
Hermes is the Magician, Mercury. Solomon is the Hermit, or Magician in exile.
This image is based on one that the Adept would use to meditate upon to establish equilibrium in the paths of Mem, the central path on the pillar of Severity, and Kaph in the center on the pillar of Mercy = invoking both the forces of The Hanged Man, and Fortune.
Mem Kaph is the value of 60, which is the value of Samekh. So the letters added to Samekh to spell sameh equal the value of Samkeh. ALSO:
In the Adept model called the Cube of Space, the Path of Samekh connected the Western Face of the Cube which correlated to Kaph, or Jupiter/Fortune to the Top of the Cube, which is Mercury/Magus, ruler of Gemini/Lovers. It is by the East-West axis of the path of the mother letter Mem that the western wall was established in the astral images the chiefs used to maintain the Temple as a magical force.
The Pillars were representative of many things, and the Beth and Yod on the pillars of the Luna/Priestess (Who forms the floor of this astral imagery) is also in front of the same pillars. The letters of them B and J add in Hebrew to 12 as well. She is more fit to represent those, zodiacally, for she extends down the middle pillar from Kether directly, while the path of the Gemini/Lovers/ Zain extends from Binah (represented by the 3's of the Small cards) to Tiphareth (represented by the 6's of the small cards), creating a bit of the turbulence you see in the smal cards dealing with Leo, (5,6,7 of wands.)