"We all know that we have within ourselves that which is called ego, I, me, myself. Unfortunately, the Essence is completely imprisoned, absorbed inside the ego, and this is lamentable. To dissolve the psychological “I,” to disintegrate its undesirable elements, is something unavoidable and non-excludable. This is the meaning of working upon oneself...

"...Unquestionably, the Essence shines within ourselves when our psychological “I” has died. The liberated Essence confers upon us inner beauty. Perfect happiness and true love emanate from such a beauty. The Essence possesses multiple senses of perfection and extraordinary natural powers. When we die within ourselves, when we dissolve the psychological “I,” we can then enjoy the precious senses and powers of the Essence." ―Samael Aun Weor, Treatise of Revolutionary Psychology

Discover the fundamental makeup or machinery of our internal, psychological constitution: the essence (soul or consciousness), ego (defects, vices, errors) and personality (language, habits, name, race, customs, culture, etc.). By learning about what makes us mechanical beings, or intellectual animals (from the Latin anima, meaning soul), we can therefore strive to make profound changes through developing the capacities and potentiality of the consciousness. By overcoming the mechanicity of our life, we can experience, in a state of alert novelty, the purpose of our existence: the manifestation and realization of our true identity.

Resources and References:

https://chicagognosis.org/lectures/discover-your-true-self