uisition. All human
association is due primarily to the instinct for sociability. These
instincts are inborn. They cannot be eradicated, but they can be
modified and controlled.

Obedience to these native instincts produces fixed habits. These are
not native but acquired, and so are not transmitted to posterity, in
the belief of most scientists, but they are powerful factors in
individual conduct. The individual early in the morning is hungry, and
the appetite for food recurs at intervals through the day; it becomes
a habit to go at certain hours where he may obtain satisfaction. So it
is with many activities throughout the day.

Instincts and habits produce impulses. The savage eats as often as he
feels like it, if he can find berries or fruit or bring down game;
impulse alone governs his conduct. But two other elements enter in to
modify impulse, as experience teaches wisdom. The self-indulgent man
remembers after a little that indulgence of impulse has resulted
sometimes in pain rather than satisfaction, and his imagination
pictures a recurrence of the unhappy experience. Feeling becomes a
guide to regulate impulse. Feeling in turn compels thought. Presently
the individual who is going through the civilizing process formulates
a resolve and a theory, a resolve to eat at regular times and to
abstain from foods that injure him, a theory that intelligent
restraint is better than unregulated indulgence. In a similar way the
individual acts with reference to selecting his environment. Instinct
and habit act conservatively, impelling the individual to remain in
the place where he was born and reared, and to follow the occupation
of his father. But he feels the discomforts of the climate or the
restrictions of his particular environment, he thinks about it,
bringing to bear all the knowledge that he possesses, and he makes his
choice between going elsewhere or modifying his present environment.
Discovery and invention are both products of such choices as these.

364. =Desires and Interests.=--These complexes of thinking, feeling,
and willing make up the conscious desires and interests that mould the
individual life. Through the processes of attention to the stimuli
that act upon human nature, discrimination between them, association
of impressions and ideas that come from present and past experience,
and deliberate judgments of value, the mind moves to action for the
satisfaction of personal desires and interests. These