Dream

Dreams are successions of images, ideas, emotions, and sensations that occur involuntarily in the mind during certain stages of sleep. The content and purpose of dreams are not definitively understood, though they have been a topic of scientific speculation, as well as a subject of philosophical and religious interest, throughout recorded history. The scientific study of dreams is called oneirology. Scientists believe that, in addition to humans, certain birds and the majority of mammals also dream.

Famous quotes containing the word dream:

“All that we see or seem
Is but a dream within a dream.”
—Edgar Allan Poe (1809–1845)

“My dream thou brok’st not, but continued’st it.
Thou art so true that thoughts of thee suffice
To make dreams truths and fables histories;
Enter these arms, for since thou thought’st it best
Not to dream all my dream, let’s act the rest.”
—John Donne (1572–1631)

“Then the bird
breaks with his beak the thread
of dream within him,
and the tree unrolls
the shadow that will guard it
throughout the day.”
—Denise Levertov (b. 1923)