If the nasal passages are put in a healthy condition, strict obedience

to the rules of individual hygiene will almost wholly prevent colds
If the nasal passages are put in a healthy condition, strict obedience
to the rules of individual hygiene will almost wholly prevent colds. In
fact, except where actual nasal defects exist, the frequency of colds is
usually a fair indication of how hygienically a person is living. The
following points need especial emphasis, though they repeat in some
cases what has already been said in the text.

Good physical development not only gives strength and skill in

the use of the body, but develops a physiological habit of
surplus power that may be called quantity of energy
Good physical development not only gives strength and skill in
the use of the body, but develops a physiological habit of
surplus power that may be called quantity of energy. Life is
not alone in quality, in delicacy of adjustment, in accuracy,
in fineness of feeling; it is also in quantity. The poet who,
with frail physique and feeble pulse, sits in his quiet retreat
and puts his fine fancies into the rhythms of verse has
quality. But in the stress and rivalry of life that awaits the
majority of men, there is a need for quantity of energy, such
as enabled a Washington or a Caesar or a Napoleon or a
Wellington to shoulder his way through difficulties. These men
combined quality with quantity and this combination may make,
and often does make, the life of masterful achievement. The
quantity of energy in us average men may make the difference
between success and failure.