Indeed, the vast and dreamy world that we call imagination, or the unconscious, may merge imperceptibly into autonomously existing worlds we would call "hyperdimensional," indicating the paradox of their simultaneous invisibility and their here-and-nowness in the psilocybin trance with a presence which belies the term hallucination.¹

The mushroom consciousness is the consciousness of the Other in hyperspace, which means in dream and in the psilocybin trance, at the quantum foundation of being, in the human future, and after death. All of these places that were thought the be discrete and separate are seen to be part of a single continuum.²

Terence McKenna

¹Open Ending
²Tryptamine Hallucinogens and Consciousness