The Spiritual Side of Life. Part 3. Adonai.

The second major stage of development is marked by what modern hermeticists call The Knowledge and Conversation of your Holy Guardian Angel.
This state is described by most, if not all, of the major religious traditions.
It is in effect a realization of some preternatural intelligence as a built in guide for one's life.
This intelligence is recognized by the experiencer as distinct from his own intelligence and it gives him access to abilities and knowledge usually acknowledged as "miraculous".
This intelligence has gone by many different names.
Socrates called it the Higher Genius,
Abramelin called it the Holy Guardian Angel,
The Hebrews called it Adonai, the personal god.
It's also been called the Daemon, the genius, Augoides, and a host of other names.
When the experience and methods of achievement are described the similarities far outweigh the differences.

This experience is essentially the high water mark of the first phase of the path of the wise. It is the first truly enlightening experience.
It requires all of the student's previous accomplishments to attain.
He must have mastered his mind (at least to a high degree), his emotions, his body of light (aka astral body) and his circumstances (though Crowley holds some contention over what mastery over circumstances really means).

I'm speaking from theory and not experience so I can only speculate what it would take to accomplish this but there are a few things that seem pretty necessary.
Yoga seems to be a must (vid Liber ABA and 8 Lectures). A steady Asana, balanced Prana, and calm Chittam seem absolutely necessary.
Also the control and development of the body of light (vid Liber ABA).
See for yourself in John st John, TOSK, The Sacred Magic of Abramelin the Mage, and more genrally throughout the Equinox and Liber ABA.