Yehida

Yehida – One of the five levels of the soul. The fifth (from the bottom) and highest level. Will be in use only when humanity reaches its total completion. Corresponding to Keter.

Yesod

Hebrew: Foundation

The sixth Sefira of Zeir Anpin’s 6 Sefirot.

Central Column of the Lower Three Sefirot, the power of balance, flow of bliss, the funnel of all the Sefirot to Malkhut.

Chariot: Josef the Righteous.

Part of Body: Reproductive Organs and the Spine.

YHVH

The Holy Name of God of the Bible, The Tetragrammaton.
The Name that is not to be pronounced.
The four letters of this name contain the power of all 10 Sefirot.