Yetzirah

Yetzirah (also known as Olam Yetsirah, עוֹלָם יְצִירָה in Hebrew) is the third of four worlds in the Kabbalistic Tree of Life, following Atziluth and Beri'ah and preceding Assiah.

On the Tree of Life diagram Yetzirah is associated with the sefirot Chesed, Gevurah, Tiferet, Netzach, Hod and Yesod.

The "half good" refers to the emotional sensitivity of one to the other as expressed in the genuine desire to make the other happy.

The sense of selfhood that is apparent at this level of consciousness can only be grasped in impersonal language.

[4] Non-permanent angels dwell in the world of Yetzirah, unlike archangels which reside in Briah.