give the best grade of service of
which he is capable, man must find a joy in the performance of the work
as well as in the end sought through its performance. No matter how high
the position or how refined the work, the worker becomes a slave to his
labor unless interest in its performance saves him.

3. TRANSITORINESS OF CERTAIN INTERESTS

Since our interests are always connected with our activities it follows
that many interests will have their birth, grow to full strength, and
then fade away as the corresponding instincts which are responsible for
the activities pass through these same stages. This only means that
interest in play develops at the time when the play activities are
seeking expression; that interest in the opposite sex becomes strong
when instinctive tendencies are directing the attention to the choice of
a mate; and that interest in abstract studies comes when the
development of the brain enables us to carry on logical trains of
thought. All of us can recall many interests which were once strong, and
are now weak or else have altogether passed away. Hide-and-seek,
Pussy-wants-a-corner, excursions to the little fishing pond, securing
the colored chromo at school, the care of pets, reading
blood-and-thunder stories or sentimental ones--interest in these things
belongs to our past, or has left but a faint shadow. Other interests
have come, and these in turn will also disappear and other new ones yet
appear as long as we keep on acquiring new experience.

INTERESTS MUST BE UTILIZED WHEN THEY APPEAR.--This means that we must
take advantage of interests when they appear if we wish to utilize and
develop them. How many people there are who at one time felt an interest
impelling them to cultivate their taste for music, art, or literature
and said they would do this at some convenient season, and finally found
themselves without a taste for these things! How many of us have felt an
interest in some benevolent work, but at last discovered that our
inclination had died before we found time to help the cause! How many of
us, young as we are, do not at this moment lament the passing of some
interest from our lives, or are now watching the dying of some interest
which we had fondly supposed was as stable as Gibraltar? The drawings of
every interest which appeals to us is a voice crying, "Now is the
appointed time!" What impulse urges us today to become or to do, we must
begin at once to be or perform, if we wo