Hallucinogen persisting perception disorder (HPPD) is a rare condition that can develop after psychedelic use. HPPD involves persisting visual changes that cause emotional distress and/or impairment to functioning. It is not clear precisely how prevalent the condition is, although its prevalence is considered low. In one study, 4.2% of participants said they experienced continued visual…
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Hagioptasia is a term coined by musician Daniel Laidler, which he says represents “a fundamental human perceptual tendency to experience an illusory sense of extraordinary ‘specialness’ in various aspects of life.” These aspects of life include music, religious and sacred objects, art, status and glamour, and nostalgia. I wrote about expressions of hagioptasia in emo…
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One of the characteristics of the psychedelic mystical experience is the noetic quality: the feeling of profound insight (this is the focus of Chapter 2 in my book Altered Perspectives). This type of insight is felt to be authoritative, that is, an incontrovertible revelation. However, insights that carry an authoritative truth can occur in non-mystical…
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The simulation hypothesis – the proposal that we live in a computer-generated reality – is a philosophical idea that many psychonauts embrace. While tripping, or post-trip, this hypothesis can seem a lot more likely to be true; in fact, it can appear undeniably true. On the subreddit r/SimulationTheory, psychedelic experiences are often discussed and viewed…
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I recently came across the term hagioptasia, coined by musician Daniel Laidler. It refers to a fleeting sense of significance and specialness, which eludes explanation. Laidler describes this experience, and how it’s a core part of nostalgia, in a blog post published last December. He challenges the commonplace notion that nostalgia is merely a sentimental…
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