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:

“And the beauty
Of the moonlight
Falling there,
Falling
As sleep falls
In the innocent air.”
—Wallace Stevens (1879–1955)

“Thyself thou gav’st, thy own worth then not knowing,
Or me, to whom thou gav’st it, else mistaking;
So thy great gift, upon misprision growing,
Comes home again, on better judgement making.
Thus have I had thee, as a dream doth flatter,
In sleep a king, but, waking, no such matter.”
—William Shakespeare (1564–1616)

“Bring me my Bow of burning gold:
Bring me my Arrows of desire:
Bring me my Spear: O clouds unfold!
Bring me my Chariot of fire!

I will not cease from Mental Fight,
Nor shall my Sword sleep in my hand,
Till we have built Jerusalem
In England’s green & pleasant Land.”
—William Blake (1757–1827)