This
letting up in the great activity of body and mind gives an opportunity
for the millions of cells, of which the body is composed, to take from
the blood what is needed to restore them to normal. During the day many
of these cells become worn and weary. At night they recuperate. Hence
undisturbed sleep is very important.
Many believe that "early to bed and early to rise" is the proper way,
that the hours of sleep before midnight are more refreshing and
invigorating than those after. This is merely a belief, perhaps a good
one. Early retiring leads to regularity, which is very desirable. Late
retiring often means loose mental and physical habits. Those who are
regular about their time of retiring and live well otherwise feel
refreshed whether they go to bed early or late. Children should always
retire early, otherwise they do not get enough sleep. The night is the
natural sleeping time for most creatures, as well as for man. This is a
heritage of ages. There was no artificial illumination during the stone
age. Man could do nothing during the darkness, so he rested. However,
those who must work at night find no trouble in sleeping during the day.
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