equently sets out on a mountain tramp
without any muscular preparation for the trip. He walks ten or fifteen
miles when his average is not over one or two. Sometimes after a few
hours he feels himself exhausted, but a glorious view opens out before
him and he goes on with new zest. He has merely increased his rate of
repair and drawn on a new stock of energy. That night he is tired, and
the next day he is likely to be stiff and sore. There is a little
fatigue left in him, but it takes only a day or two for the body to be
wholly refreshed, especially if he hastens the process by another good
walk. Up to a certain point, far beyond our usual limit, the more we
do, the more we can do.

One day after a long walk my little daughter said that she could go no
farther and waited to be carried. But she soon spied a dog on ahead
and ran off after him with new zest. She followed the dog back and
forth, running more than a mile before she reached home, and then in
the exuberance of her spirits, ran around the house three times.

=The Emotions Again.= What is the key that unlocks new stores of
energy and drives away fatigue? What is it in the amateur
mountain-climbers that helps the body maintain its new standard? What
keeps indefatigable workers on the job long after the ordinary man has
tired? Is it not always an invigorating emotion,--the zest of
pursuit, the joy of battle, intense interest in work, or a new
enthusiasm? All great military commanders know the importance of
morale. They know that troops can stand more while they are going
forward than while running away, that the more contented and hopeful
they are, the better fighters they make; discouragement, lack of
interest, the fighting of a losing game, dearth of appreciation,
futility of effort, monotony of task, all conspire in soldier or
civilian to use up and to lock up energy which might have been
available for real work. Approaching the matter from a new angle, we
find once more that the difference between strength and weakness is in
many cases merely a difference in the emotions and feeling-tones which
habitually control.

Fatigue is a safety-device of nature to keep us within safe limits,
but it is a device toward which we must not become too sensitive. As a
rule it makes us stop long before the danger point is reached. If we
fall into the habit of watching its first signals, they may easily
become so insistent that they monopolize attention. Attention
increases