Were all instructors to realize that the quality of mental process, not the production of correct answers, is the measure of educative growth somethi… - John Dewey

Scientific principles and laws do not lie on the surface of nature. They are hidden, and must be wrested from nature by an active and elaborate technique of inquiry.

Life itself consists of phases in which the organism falls out of step with the march of surrounding things and then recovers unison with it — either through effort or by some happy chance. And, in a growing life, the recovery is never mere return to a prior state, for it is enriched by the state of disparity and resistance through which it has successfully passed. If the gap between organism and environment is too wide, the creature dies. If its activity is not enhanced by the temporary alienation, it merely subsists. Life grows when a temporary falling out is a transition to a more extensive balance of the energies of the organism with those of the conditions under which it lives.

Every thinker puts some portion of an apparently stable world in peril and no one can wholly predict what will emerge in its place.