Moshiach is sometimes called "Essential Intellects". Our Intellects are the Sephirot of Chochmah, Binah, and Daat. These can be in three stages, Moshiach is an additional fourth stage:
- Nursing Intellects - the intellects are not yet complete and are entirely dependent on an external source. analogous to a baby that has no intellect of his own and is dependent on his mother's intellect.
- Constricted Intellects - analogous to the intellects of a child, who has the ability to think, but will prefer a candy to a fortune. In Spirit - this is the most common state of consciousness - we will exchange spiritual wealth in return for pleasure or lack of pain of our ego.
- Expanded Intellects - a "grown up" is responsible to go to work and do complex calculations of cost vs benefit. In Spirit, this is an enlightened person who sees the inner meaning behind our ego-centric worldly experience.
The 4th category is Essential Intellects, these are not available in general other then to the greatest souls like Rabbi Shimon Bar Yochai or the Baal Shem Tov. After 1991 these intellects are also available in the world, these are experiences of complete Oneness with Hashem.