Psychedelic drugs, especially ...

Psychedelic drugs, especially psilocybin, allow a searchlight to be thrown on these deeper levels of the psyche, as Jung correctly stated. But it is not a museum of archetypes or psychic constructs, as he seemed to assume. It is a frontier of wholeness into which any person, so motivated and so courageous as to wish to do it, can go and leave the mundane plane far behind.
Psychedelic drugs, especially psilocybin, allow a searchlight to be thrown on these deeper levels of the psyche, as Jung correctly stated. But it is not a museum of archetypes or psychic constructs, as he seemed to assume. It is a frontier of wholeness into which any person, so motivated and so courageous as to wish to do it, can go and leave the mundane plane far behind.
 Terence McKenna

Quotes from the same author

The entire drug phenomenon of the 1960s happened without the concept of shamanism to help it along.
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 Terence McKenna
Where psychedelics comes together with that is that it's going to require a transformation of human language and understanding to stop the momentum of the historical process, to halt nuclear proliferation, germ warfare, infantile 19th century politics, all these things. It cannot be accomplished through a frontal assault upon it by political means.
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 Terence McKenna
The main thing going on in the 20th century is a dissolving of boundaries, all the boundaries that historical civilization put in place.
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 Terence McKenna
Television is, to my mind, the most insidious drug that the 20th Century has had to deal with.
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 Terence McKenna
In the way that the 15th Century discovered the New World, the 20th Century discovered the parallel continuum.
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 Terence McKenna