[Footnote 1: See Helen Marot: _Creative Impulse in Industry_.]
MENTAL ACTIVITY. Just as physical activity is a characteristic of all living beings, so, from almost earliest infancy of human beings, is mental activity. This does not mean that individuals from their babyhood are continually solving problems. Deliberation and reflection are simply the mature and disciplined control of what goes on during all of our waking hours--random play of the fancy, imagination. We are not always controlling our thought, but so long as we are awake something is, as we say, passing through our heads. Everything that happens about us provokes some suggestion or idea. "Day-dreaming, building of castles in the air, that loose flux of casual and disconnected material that floats through our minds in relaxed moments, are, in this random sense, _thinking_. More of our waking life than we should care to admit, even to ourselves, is likely to be whiled away in this inconsequential trifling with idle fancy and unsubstantial hope."[1]
[Footnote 1: Dewey: _How We Think_, p. 2.]
This play of the imagination is most uncontrolled and spontaneous in childhood, which is often characteristically defined as the period of make-believe or fancy. It is this capacity which enables the child to use chairs as locomotives, sticks as rifles, and wheelbarrows as automobiles. As we grow older we tend to discipline this vagrant dreaming, and to draw only those suggestions from objects which tally with the workaday world we live in. We stop playing with our imagination and put our minds to work. But in adult life desire for the play of the mind, like the desire for the play of the body, persists. The endeavor of education is not to crush but to control it.
Imagination, used here in the sense of random mental activity, may be controlled in two ways, both significant for human welfare. When it is controlled with reference to some emotional theme, as in fiction, drama, and poetry, it has no reference necessarily to actual objects or events; it is concerned only with producing the effect of emotional congruity between incidents, objects, forms, or sounds. A great novel does not pretend to be a literal transcript of experience, nor a portrait of an actual person. When random mental activity is thus controlled, it is "imagination," in the popular sense, the sense in which poets, painters, and dramatists are called imaginative artists.