Ayahuasca is driven by sound, by song, by whistling. And its ability to transform sound, including vocal sound, into the visual spectrum indicates that some kind of information processing membrane or boundary is being overcome by the pharmacology of this stuff. And things normally experienced as acoustically experienced becomes visibly beheld, and it's quite spectacular.
Terence McKennaThe western mind, because of it's unique history, is the most sensitive mind to the impact of psychedelics.
Terence McKennaThe same organizational principles which called us forth into self-reflection have called forth self-reflection out of the planet itself. And the problem then is for us to suspect this, act on our suspicion, and be good detectives, and track down the spirit in its lair. And this is what shamans are doing. They are hunters of spirit.
Terence McKenna