What Island Man said.
There are many ways to access to the unconscious and experience an altered state of consciousness:
- drugs
- meditation
- hypnosis
- near-death experiences
- religious epiphanies
- intense prayer and fasting chanting
- speaking repeatedly and ecstatically in tongues
to name a few (there are also altered states that arise from illnesses, such as a fever or psychosis).
I have personally experienced altered states of consciousness when I engaged in deep, strong, intense prayer and mediation.
I was simply following the WT's, Bible's and elder's advice to draw close to God, become absorbed with him through deep prayer and meditation however, unknown to myself, I was actually self-inducing, voluntarily inducing an altered state of consciousness by doing this.
I posted my experience in this thread:
https://www.jehovahs-witness.com/topic/6318622471356416/spirit-channeling-wallkills-bethel
Indeed, drugs can provide access to the inner world of the unconscious.
During a drug-induced (or otherwise induced) altered state of consciousness, you bypass the conscious, active processing of information in your brain and instead "see" directly into the deep levels of your subconscious where "unprocessed files" are buried.
You are just churning up unprocessed thoughts, impressions, images, visions, voices, words etc from the deep levels of your subconscious.
This also opens the way to the unlocking of a deep level of consciousness where psychic and extrasensory perception can be done. New insights well up directly from the fluid matrix of the subconscious and the subtle processing taking place there, without having to be first processed at the conscious level.
Our minds are never perfectly still. There is always subtle
processing going on in which we can't consciously identify the thoughts in terms of clear words or clear images. There are rapid and fleeting associations taking place in the subconscious mind.
Drugs like Ayahuasca can provide access to the unconscious, and help associate dissimilar things in meaningful ways.
This is perhaps the reason why drugs like Ayahuasca are used in the treatment alcohol addicts.
The renown psychologist Carl Jung made the excellent point that when trauma, distress unresolved issues, concerns, fears, worries etc are buried in the subconscious, if they are not dealt with, then they will take on a life of their own.
A lot of times people just can't verbalize, articulate, identify, label what is going on inside them, while whatever is buried in their unconscious takes on a life of its own as there is no intervention.
Drug-induced altered state of consciousness can help such persons face and experience the unpleasant, frightening contents of their collective unconscious.