This is a general comment that you should take a committed dose of whatever it is you're taking so that there is no ambiguity, because there's nothing worse than a sub-threshold psychedelic experience.
Terence McKennaThe history of man that you don't know is what your unconscious is made out of. Just as the history of yourself that you don't know is what your personal unconscious is made out of.
Terence McKennaApparently, in the Avesta classical period no one would have dreamed of having a spiritual experience without resort to drugs.
Terence McKenna