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A
nornnl
person
lives
in
the
dynamic
equilibrium
of
natural
and
social
conditions.
lf
this
equilibrium
cannot be
maintained,
his
health
suffers.
f,lornnl microorganisffg are
helpful
to
the
human body
vvhen
they can adapt thenselves
to
the
oueide
conditions;
vvhen
they
cannot,
they
are
harmful.
Diseases
are
caused
by
the
social
factor
through psychological
activities.
Therefore, keeping
the
balance
of
body
and
soul
means
to
nnke
a
person
adapt himself
to
the
social
conditions, that
is,
to
nleke
him
healthy.
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