— Sam Harris American author, philosopher and neuroscientist 1967
Context: I have visited both extremes on the psychedelic continuum. The positive experiences were more sublime than I could have ever imagined or than I can now faithfully recall. These chemicals disclose layers of beauty that art is powerless to capture and for which the beauty of Nature herself is a mere simulacrum. It is one thing to be awestruck by the sight of a giant redwood and to be amazed at the details of its history and underlying biology. It is quite another to spend an apparent eternity in egoless communion with it. Positive psychedelic experiences often reveal how wondrously at ease in the universe a human being can be—and for most of us, normal waking consciousness does not offer so much as a glimmer of these deeper possibilities... But as the peaks are high, the valleys are deep. My “bad trips” were, without question, the most harrowing hours I have ever suffered—and they make the notion of hell, as a metaphor if not a destination, seem perfectly apt.
Sam Harris, Drugs and the Meaning of Life http://www.samharris.org/blog/item/drugs-and-the-meaning-of-life/ (5 July 2011)