He chose three letters
from among the Elementals
[in the Mystery of the three Mothers
Alef Mem Shin]
And he set them in His great Name
and with them, He sealed six Extremities.
…Six: He sealed below and faced downward
and sealed it with ה י ו
— Sepher Yetzirah

Tiphareth is God the Son, the Sacrificed Gods, consciousness of the Higher Self and of the Greater Masters, the vision of the harmony of things. It is the Sun before the Sun: sitting below the Abyss, it shields us from the greater light of Kether, and it from us. It is self-consciousness, the I that thinks of itself as I am.