reserves of energy, does his work easily and without friction.
Half the timidities and indecisions of men are chargeable less
to lack of ability than to lack of the physical vigor, the
QUANTITY of energy, which is the driving power of character. In
all the contests of life an important element in success is the
ability to endure prolonged stress, to have the reserve energy
that can be drawn upon and utilized as a driving force. This
power is not alone necessary in the emergencies, the "short
hauls" of life, but also in the long hauls that spread the
strain through greater periods. Many of the failures of life
are due as much to lack of ability to meet prolonged stress as
to lack of experience or intelligence. Men of moderate ability
but with great powers of endurance often succeed, while men of
greater talent fail for lack of the ability to endure strain.

The man with a weak body and without the self-confidence that
surplus energy gives is liable to be of uncertain judgment.
Such a man in the presence of a problem requiring quick
decision, doubts and hesitates and stands shivering on the
brink of action while hastening opportunities pass him by.

Much of the loose thinking of our time is undoubtedly due to
poor educational drill. In fact the failure of the schools to
teach pupils how to apply the mind and how to think is one of
their common reproaches. Inability to use the mind effectively
is also frequently due to a lack of vigor and physical stamina.
A person with poor digestion, or under-developed body, or weak
circulation has of necessity a badly nourished brain. Such a
brain, unless it belongs to a genius, will do poor thinking.