[aftoprokrustes]

This might be true if what you want is to emulate the experience under actual psychedelic drugs; I do not think that this is necessary if your only aim is to create _transformative_ or _healing_ experiences.

One of the core concepts of Rob Burbea I mentionned above is the idea of "imaginal middle way", which, in short, consists in seeing mental images as "neither real nor not real", "simultanously discovered and created". Going deeper into that topic would require way too much text and time for a simple comment here, but I can tell from experience that this way to engage with imaginative faculties can have deep and long lasting effects. And the important aspect here is that, while engaging with the image, one is constantly balancing between reification (considereing the image, for instance of a divinity, as having independent reality) and disdain (considering the image as "just made up").