Argument

Dream

Overview

A dream is a succession of images, dynamic scenes and situations, ideas, emotions, and sensations that usually occur involuntarily in the mind during certain stages of sleep. Humans spend more than two hours dreaming per night, and each dream lasts around 5–20 minutes.

The content and function of dreams have been topics of scientific, philosophical and religious interest throughout recorded history. Dream interpretation, practiced by the Babylonians in the third millennium BCE and even earlier by the ancient Sumerians, figures prominently in religious texts in several traditions, and has played a lead role in psychotherapy. Dreamwork is similar, but does not seek to conclude with definite meaning. The scientific study of dreams is called oneirology. Most modern dream study focuses on the neurophysiology of dreams and on proposing and testing hypotheses regarding dream function. It is not known where in the brain dreams originate, if there is a single origin for dreams or if multiple regions of the brain are involved, or what the purpose of dreaming is for the body (or brain or mind).

The human dream experience and what to make of it has undergone sizable shifts over the course of history. Long ago, according to writings from Mesopotamia and Ancient Egypt, dreams dictated post-dream behaviors to an extent that was sharply reduced in later millennia. These ancient writings about dreams highlight visitation dreams, where a dream figure, usually a deity or a prominent forebear, commands the dreamer to take specific actions, and which may predict future events. Framing the dream experience varies across cultures as well as through time.

Dreaming and sleep are intertwined. Dreams occur mainly in the rapid-eye movement (REM) stage of sleep—when brain activity is high and resembles that of being awake. Because REM sleep is detectable in many species, and because research suggests that all mammals experience REM, linking dreams to REM sleep has led to conjectures that animals dream. However, humans dream during non-REM sleep, also, and not all REM awakenings elicit dream reports. To be studied, a dream must first be reduced to a verbal report, which is an account of the subject's memory of the dream, not the subject's dream experience itself. Therefore, dreaming by non-humans is currently unprovable, as is dreaming by human fetuses and pre-verbal infants.

Overview adapted from Wikipedia (CC BY-SA 4.0; see the article history for authors).

In the original texts

Passages from public-domain books where Dream is discussed.

The scene of the dream is not infrequently nothing but a modified repetition, complicated by interpolations of events that have left such an impression; the dream but very seldom reproduces accurate and unmixed reproductions of real scenes. The dream content does not, however, consist exclusively of scenes, but it also includes scattered fragments of visual images, conversations, and even bits of unchanged thoughts.
Sigmund Freud, Dream Psychology
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We have solved the riddle of the superabundant dream content compressed within the briefest moment by explaining that this is due to the appropriation of almost fully formed structures from the psychic life. That the dream is disfigured and distorted by memory we found to be correct, but not troublesome, as this is only the last manifest operation in the work of disfigurement which has been active from the beginning…
Sigmund Freud, The Interpretation of Dreams
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It remains now to explain how the peculiar relaxation of the mind in the dream accounts for the preference given by the dreamer to one memory image rather than others, equally capable of being inserted into the actual sensations. There is a current prejudice to the effect that we dream mostly about the events which have especially preoccupied us during the day. This is sometimes true. But when the psychological life…
Henri Bergson, Dreams
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Dream thought comes so easily to us now because we are so thoroughly trained to it through the interminable stages of evolution during which this fanciful and facile form of theorising has prevailed. To a certain extent the dream is a restorative for the brain, which, during the day, is called upon to meet the many demands for trained thought made upon it by the conditions of a higher civilization.--We may, if we…
Friedrich Wilhelm Nietzsche, Human, All Too Human
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Dreams The imaginations of them that sleep, are those we call Dreams. And these also (as all other Imaginations) have been before, either totally, or by parcells in the Sense. And because in sense, the Brain, and Nerves, which are the necessary Organs of sense, are so benummed in sleep, as not easily to be moved by the action of Externall Objects, there can happen in sleep, no Imagination;…
Thomas Hobbes, Leviathan
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Dream

Overview

In the original texts

Philosophers who discussed Dream

Related ideas

Place in the tradition