Certainly neo-Platonism, Plotinus and Porphyry and that school are psychedelic philosophers. Their idea of an ascending hierarchy of more and more rarefied states is a sophisticated presentation of the shamanic cosmology, which is the cosmology that one experientially discovers when they involve themselves with psychedelics.

The only real experience that counts, is your own.

I often like to think that our map of the world is wrong, that where we have centered physics, we should actually place literature as the central metaphor that we want to work out from. Because I think literature occupies the same relationship to life that life occupies to death. A book is life with one dimension pulled out of it. And life is something that lacks a dimension which death will give it. I imagine death to be a kind of release into the imagination in the sense that for characters in a book, what we experience is an unimaginable dimension of freedom.

The central figure in the archaic revival is the shaman.

Inwardness is the characteristic feature of the vegetable rather than the animal approach to existence. The animals move, migrate and swarm, while plants hold fast. Plants live in a dimension characterised by solid state, the fixed and the enduring. If there is movement in the consciousness of plants then it must be the movement of spirit and attention in the domain of vegetal imagination. (...) This is the truth that the shamans have always known and practiced. Awareness of the green side of mind was called Veriditas by the twelfth century visionary Hildegard Von Bingen.

The psychedelic experience is not a journey into the human unconscious, or into the ghost bards of our human civilization. It's a journey into the presence of the Gaian mind.

The shaman is not merely a sick man, or a madman; he is a sick man who has healed himself.