Perception of eternalism
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Perception of eternalism can be described as the experience of a major alteration of one's perspective of the fundamental mechanics behind the linear continuity of time moving from the past to the present to the future. During this state of mind, it feels as if all points across the timeline of existence are equally "real" and are occurring simultaneously alongside each other. Every point in time is felt to exist regardless of the person's current position within the overall timeline, much as all points in physical space persist regardless of the observer's location.
While all moments are felt to be equally real, the directional flow of time is felt to be maintained, with the present always being the moment which is currently experienced. All moments in time are still felt to be linked together by causality, the past necessitating the present, which necessitates the future, and so forth.
A common conclusion that is reached during the experience of this state is that although one's life inevitably will end, it will apparently persist forever within its own timeframe and is therefore perpetual despite not being infinite in its length. Birth and death are therefore seen as merely the start and end points of the range of time that a person exists in eternally, if not experiences eternally.
This sudden change in perspective starkly contrasts with the standard perception of time in which only the present is felt to exist, while the past no longer is and the future is yet to be.
Perception of eternalism is often accompanied by other coinciding transpersonal effects such as unity and interconnectedness and feelings of interdependent opposites. It is most commonly induced under the influence of heavy dosages of psychedelic compounds, such as LSD, psilocybin, and mescaline.