THE ORIGIN AND NATURE OF REFLECTION. Reflection, it must be noted in the first place, is not a thing, but a process. It is a process whereby human beings adjust themselves to a continuously changing environment. Our instincts and habits suffice to adapt us to that large number of recurrent similar situations of which our experience in no small measure exists. In such cases the habitual response will bring the usual satisfaction. Walking, dressing, getting to familiar places, finding the electric button in well-known rooms, opening often-opened combinations--these operations are all adequately accomplished by the fixed mechanisms of habit. But we meet as frequently with novel situations where the accustomed or instinctive reactions will not bring the desired satisfaction. One response or a number of responses will not adjust the individual satisfactorily to external conditions; or there may be a conflict between a number of impulses all clamoring for satisfaction at once. Reflection thus begins either in a maladjustment between the individual and his environment or in a conflict of impulses within the same person. Where such a maladjustment occurs, the uneasiness, discomfort, and frustration of action may be removed in one of two ways. Adjustment may be achieved, as we have already seen, through physical trial and error, through a hit-and-miss experimentation with every possible response until the appropriate one is made. This is the only way in which animals can learn to modify their instinctive tendencies into habits more adequate to their conditions. The more economical and effective process, one peculiar to human beings, is that of reflection. To think or to reflect means to postpone response to a given problematic situation until the possible consequences of the possible responses have been mentally traced out. Instead of _actually_ making every response that occurs to us, we make all of them _imaginatively_. Instead of consuming time and energy in physical trial and error, we go through the process of mental trial and error. We make no response at all in action until we have surveyed all the possibilities of action and their possible consequences. And when we do make a response we make it on the basis of those foreseen consequences.[1] [Footnote 1: The possibilities of response that do occur to us are, on the whole, determined by past training and native differences in temperament. But part of the process of reflection is, as we shall see in the chapter on "Science and Scientific Method," concerned with deliberately enlarging the field of possible responses in the solution of a given problem.]