The Tree of Life is the map of spiritual consciousness discussed in Kabbalah.

The Tree of Life describes how we are spiritually developing to experience the infinite goodness that is the source of reality. As we spiritually develop to deeper levels of giving and love, we ascend to higher levels of divine awareness.

The Tree of Life is comprised of 10 aspects of our inner self and levels of divine experience called Sefirot.

This art reflects the progression of the 10 Sefirot ascending through our five soul levels of: Nefesh, Ruach, Neshama, Chaya and Yechida.

Keter, the highest Sefira of each soul level, is depicted as the Malchut, the lowest Sefira, of the next level up.

This reflects the idea that the highest love and goodness we can possibly conceive, is just the beginning of our next level of spiritual consciousness.

The progression is repeated 4 times horizontally reflecting the 4 letters of the Divine name
 י – ה – ו – ה 

The 10 Sefirot and one of many ways of describing them:

Keter             Divine Source
Chochma      Oneness
Bina              Unconditional Love
Chesed          Loving Kindness
Gevurah       Humility
Tiferet           Balance
Netzach        Eternity
Hod               Thankfulness
Yesod            Unity
Malchut        Central Point in the Heart