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For correct living, it is essential to differential between sleep
and rest. At rest the body is disturbed by all exterior noises ;
but in sleep it is screened from them by partial loss of consciousness
and also by what is called " dream protection. " One useful
purpose of the dream is to convert outside noises that might awake
the sleeping person, into fantasies that do not disturb him.During
rest the limbs are normal, but in sleep they swell.
Blood flows from the brain, distends the arteries, and makes the
limbs bigger. IN sleep more muscles are relaxed than in rest, though
the sleeping person changes his position about 35 times in one night,
without knowing it. Many organs which work during rest suspend their
activities in sleep. Thus the recouping value of sleep is much more
than that of rest or simple lying down.
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