rested in his work and who finds delight in overcoming the
difficulties of his calling is not likely to become so tired as the man
for whom the work is a burden.

"Victory in intercollegiate athletic events depends on will power and
physical endurance. This is particularly apparent in football. Frequently
it is not the team with the greater muscular development or speed of foot
that wins the victory, but the one with the more grit and perseverance. At
the conclusion of a game players are often unable to walk from the field
and need to be carried. Occasionally the winning team has actually worked
the harder and received the more serious injuries. Regardless of this
fact, it is usually true that the victorious team leaves the field less
jaded than the conquered team. Furthermore, the winners will report next
day refreshed and ready for further training, while the losers may require
several days to overcome the shock and exhaustion of their defeat.

"Recently I had a very hard contest at tennis. Some hours after the game I
was still too tired to do effective work. I wondered why, until I
remembered that I had been thoroughly beaten, and that, too, by an
opponent whom I felt I outclassed. I had been in the habit of playing even
harder contests and ordinarily with no discomfort--especially when
successful in winning the match.

"What I have found so apparent in physical exertion is equally true in
intellectual labor. Writing or research work which progresses
satisfactorily leaves me relatively fresh; unsuccessful efforts bring
their aftermath of weariness.

"_Intellectual work which is pleasant is stimulating and does not fag one,
while intellectual work which is uninteresting or displeasing is
depressing and exhausting_....

"To restore muscular and nerve cells is a very delicate process. So
wonderful is the human organism, however, that the process is carried on
perfectly without our consciousness or volition except under abnormal
conditions.

"Food and air are the first essentials of this restoration. In-directly
the perfect working of all the bodily organs contributes to the
process--especially deepened breathing, heightened pulse, and increase of
bodily volume due to the expansion of the blood vessels running just
beneath the skin.

"Here pleasure enters. Its effect on the expenditure of energy is to make
muscle and brain cells more available for consumption, and particularly to
hasten the process of restoration