What words can describe such wonderful things?? I present to you an attempted illustration to substantiate my case. Italic quotes are taken from Astara's Book of Life to help illustrate my journey.
The most renowned of all Mysteries were those of Isis and Osiris in Egypt. In the Seventh Degree the initiate was taken to the King's Chamber in the Great Pyramid. There he or she entered an out-of-body experience, during which initiation at the moment of death was realized. For over 10 years I have prepared for this moment, not tasting meat, wine, or drugs. A cleanse of 3 cycles of the purging power of Kambo medicine has prepared the temple for initiation into the Mysteries of Sapo Bufo.
My guide introduces me to the apparatus through which the sacred secretion will be transmuted from gold to ether and where it will plunge into my airways, enter the blood, cross the holy threshold of my brainstem and unite in holy matrimony with its bride in the king's chamber of my head.
I take a sample "take" on the mechanism with no medicine that I might feel the long slow and deep drag which I will soon partake.
I am instructed to perform yogic "breath of fire" to oxygenate my brain and nervous system. My belly pumps like a bellows excreting the air again and again from my lungs and filling me with vitality.
The guide prepares a sample dose for initial intake. He blazes the glass vial screwed into the end of the apparatus with a torch flame.
I inhale the sacrament. Just a bit; hold, and release.
"Do you feel anything?"
No, just a very subtle pleasantness, barely noticeable if at all. I think I saw the chimney swirl ever so slightly, but it could be my imagination.
"Ok, you can handle the medicine. Now, I am going to launch you."
He torches the glass for a moment, and I begin my long take of the smooth vaporized venom crystals. About 2/3 way in-breath, I choke ever so slightly, inhale some air, and continue on the apparatus until I am at capacity.
I hold.
I am sitting upright on the couch, feet on the floor. I lower the cloth of my tactical desert scarf down over my eyes, and slowly exhale.

Before full decent of my breath, I rise to the cerebral center of my ancient and primaeval mammalian brain.
Breathless, I sit in the ocean of nothingness.
The phenomenal world encloses in upon itself, and subtle tones of light and sound vibrations emanate in the void.
I stare into the emptiness of fullness for a timeless eternity.
This is the time before time with no thought or action.
Is this the yogic state of nirvikalpa Samadhi?

"Don't forget to breath," a distant voice echoes into the void from somewhere without, reminding me of the structure beneath, the temple of my soul.
I inhale deeply, hold, and exhale again and again, staring into the infinity of a selfless state.
Bells and chimes resound and echo from a distant place. They are the tools used by the guide practitioner to give the voyager some anchor through which to place his transcendent attention. Beautiful melodies resound the within grounding the experience with celestial vibrations and assisting in whatever terror or astonishment that might capture the ecstatic soul in their whirlwind of experience.
The intensity is magnificent and never ending.
Strongly and deeply, I inhale and exhale, though barely aware of the mechanism below through which the action takes place.
Waves and waves of powerful energy engulf my within.
Is this forever?
Finally, I surrender to the experience. My body relaxes backwards, reclining against the couch on which I sit.
Ok, I surrender.

What's this? Moments after I relax, there is a slow and gentle decent into cognitive form.
"How are you doing," subtly the voice enters the dissipating void state.
The bells continue to chime, and my self awareness begins to blissfully unfold as my bodily awareness returns.
I find my voice as the atoms of my body return to their assigned pathways.
"I don't know if there are any words to describe what just happened," is the first thing that comes out of my mouth.
"That was intense; VERY intense...
but familiar... its not like we havn't been here before. We have been here many times, because this state is always existing."
"Yes," he says, "its just a matter of remembering."
Cognitive rationality begins to emerge. I am here just as I was before. I am in my body, I can see and think, and speak. Everything is fine... and wonderful!! I am still high from the experience, but I can operate completely normally. There is no hangover or dis-association. Just a wondering awe of attempting to conceptualize the experience. The entire procedure felt completely natural.
Now, I the neophyte of Sapo Bufo return to the world to continue my work.
When a pupil was accepted as a candidate in the Mysteries he or she entered as a neophyte, became a disciple... and emerged as an initiate.