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In Zen the key practice is sitting meditation (Zazen or 座禅).

Is monks' experience in Zazen like the LSD effect (i.e. "ego is dead")?

Does Zazen give at least approximately some experience similar to LSD -- perhaps including, for example, "tears, laughter, and then everything becoming clear"?

Are there any scientific experiments, books, interviews with scientists about this? I'm looking for, but can't find, any scientific information about it.

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The best answers you're going to find are in James Austin's Zen and the Brain. Austin is a neuropsychologist and long time zen practitioner and while I don't remember him explicitly comparing zen practice to psychedelics, he gives some extremely lucid, detailed accounts of the non-ordinary mental phenomenon that go on during deep states of meditation. Specifically, he hits on a lot of those conditions of a specifically zen flavor that often coincide with states of sleep deprivation, etc. It's a long, heavily researched, but pretty awesome read.

From personal experience, though, I can tell you that while there is some overlap between zen and psychedelics, the zen experience is much more controlled, less prone to extraneous perception, and on the whole, I'd argue much more transformative. Remember, it's not the mental state that produces the change in personality but rather the effort, ego subjugation, and self-offering that gets you there.

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Zen is very unlikely to produce LSD-like effects. It is just sitting. There isn't an object like breath or visualization to focus on, it's more like un-focusing the mind.

According to some ancient sources, some ritual substances produce effects that are called "siddhis," or in laymens' terms, psychic phenomenon. Ancient texts in yoga and Buddhism contain descriptions of states of consciouness associated with siddhis, or iddhis.

"Psychic powers arise by birth, drugs, incantations, purificatory acts or concentrated insight." - Patanjali Yoga Sutra

This web site is about Mindfulness Meditation, which like Zen practice, moves one AWAY from altered states, rather than to them. The effects of this are not "powerful" but are more permanent, if that interests you.

Siddhis: In Tibetan Buddhism it's much the same as Shaivism (not sure why Wikipedia did not list for Buddhism here): "Shaivism In Shaivism, siddhi are defined as "Extraordinary powers of the soul, developed through consistent meditation and often uncomfortable and grueling tapas, or awakened naturally through spiritual maturity and yogic sādhanā." Eight primary siddhis according to Shaivism According to some forms of Shaivism, the eight classical siddhis (Ashta Siddhi) or eight great perfections are: Aṇimā: reducing one's body to the size of an atom Mahimā: expanding one's body to an infinitely large size Garimā: becoming infinitely heavy Laghimā: becoming almost weightless Prāpti: ability to be anywhere at will Prākāmya: realizing whatever one desires Īśiṭva: supremacy over nature Vaśiṭva: control of natural forces"

Or in Pali text its called "iddhi" or "rddhi" According to Bowker, there are eight ṛddhi powers:

Replicate and project bodily-images of oneself, Make oneself invisible, Pass through solid objects, Sink into solid ground, Walk on water, Fly, Touch the sun and moon with one's hand, Ascend to the world of the god Brahmā in the highest heavens According to the Iddhipada-vibhanga Sutta (SN 51.20)

Having been one he becomes many; having been many he becomes one. He appears. He vanishes. He goes unimpeded through walls, ramparts, & mountains as if through space. He dives in and out of the earth as if it were water. He walks on water without sinking as if it were dry land. Sitting crosslegged he flies through the air like a winged bird. With his hand he touches & strokes even the sun & moon, so mighty & powerful. He exercises influence with his body even as far as the Brahma worlds. In the book Great Disciples of the Buddha by Nyanaponika Thera and Hellmuth Hecker, there are several additional powers described:

The Divine Eye (Clairvoyance)- this power allows one to see beings in other realms as well as see the future The Divine Ear (Clairaudience) Travel by Mind-Made Body(Astral Travel) Travel with the Physical Body (to other realms) Telekinesis (Supernormal Locomotion) Flying The power of Transformation The ability to replicate one's body Penetration of others' minds (Thought Reading) Passing through solid objects Diving in and out of the Earth as if through water Walking on water Touching the sun and the moon with one's fingers Becoming invisible Recollection of past lives (some would call this a power, some would call it true knowledge)

Even in the case of those who seek to develop these powers, it's not a matter of something temporary such as a drug. It's more like a life-long pursuit. Most Buddhist, even advanced ones, see this a a trap, only further attachment, and will try to avoid these as much as possible.

  • Thanks a lot, but your answer containing "non-scientific" text. I need only science. – 0-Level UNIX Monk May 10 at 23:02
  • @0-LevelUNIXMonk Hi! You asked about monks' experience when in Zazen. So most answers may come from personal experience rather than scientific papers. Most people here are practitioners, so it's probable that most answers may come from practice instead of science. Kind regards! – Brian Díaz Flores May 11 at 1:02
  • amazon.com/True-Path-Western-Science-Quest-ebook/dp/B001G8XGPG - this book might address some of your questions – brother eric May 31 at 5:23

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