With the change in standpoint from self-included existence to including process, from structural unit of composition to controlling unity of function, from changeless form to movement in growth, the whole scheme of values is transformed. Faculties are definite directions of development; elements are products that are starting-points for new processes; bare facts are indices of change; static conditions are modes of accomplished adjustment. Not that the concrete, empirical phenomenon loses in worth, much less that unverifiable “metaphysical” entities are impertinently introduced; but that our aim is the discovery of a process of actions in its adaptations to circumstance. If we apply this evolutionary logic in psychology, where shall we stop? Questions of limits of stimuli in a given sense, say hearing, are in reality questions of temporary arrests, adjustments marking the favorable equilibrium of the whole organism; they connect with the question of the use of sensation in general and auditory sensations in particular for life-habits; of the origin and use of localized and distinguished perception; and this, in turn, involves within itself the whole question of space and time recognition; the significance of the thing-and-quality experience, and so on. And when we are told that the question of the origin of space experience has nothing at all to do with the question of the nature and significance of the space experienced, the statement is simply evidence that the one who makes it is still at the static standpoint; he believes that things, that relations, have existence and significance apart from the particular conditions under which they come into experience, and apart from the special service rendered in those particular conditions. Of course, I am far from saying that every psychologist must make the whole journey. Each individual may contract, as he pleases, for any section or subsection he prefers; and undoubtedly the well-being of the science is advanced by such division of labor. But psychology goes over the whole ground from detecting every distinct act of experiencing, to seeing what need calls out the special organ fitted to cope with the situation, and discovering the machinery through which it operates to keep a-going the course of action.