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.
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Famous quotes containing the word sleep:
“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)
“My one and noble heart has witnesses
In all love’s countries, that will watch awake;
And when blind sleep falls on the spying senses,
The heart is sensual, though five eyes break.”
—Dylan Thomas (1914–1953)
“Freedom is the moment between sleep and waking before selfhood and the world return.”
—Mason Cooley (b. 1927)