Sleep

Sleep is a naturally recurring state characterized by reduced or absent consciousness, relatively suspended sensory activity, and inactivity of nearly all voluntary muscles. It is distinguished from quiet wakefulness by a decreased ability to react to stimuli, and is more easily reversible than being in hibernation or a coma. Sleep is a heightened anabolic state, accentuating the growth and rejuvenation of the immune, nervous, skeletal and muscular systems. It is observed in all mammals, all birds, and many reptiles, amphibians, and fish.

Famous quotes containing the word sleep:

“In a dream, in a vision of the night, when deep sleep falls on mortals, while they slumber on their beds, then he opens their ears, and terrifies them with warnings, that he may turn them aside from their deeds, and keep them from pride, to spare their souls from the Pit, their lives from traversing the River.”
—Bible: Hebrew, Job 33:15 -18.

“And we, barely recalled from sleep there, sense
Arrivals lowing in a doleful distance
Horny dilemmas at the gate once more.
Come and choose wrong, they cry, come and choose wrong....”
—Philip Larkin (1922–1986)

“His speech is a burning fire;
With his lips he travaileth;
In his heart is a blind desire,
In his eyes foreknowledge of death:
He weaves, and is clothed with derision;
Sows, and he shall not reap;
His life is a watch or a vision
Between a sleep and a sleep.”
—A.C. (Algernon Charles)