As was suggested a moment ago, the contrast between ordinary experience and something else of which it is the appearance is the result of the failure to give proper recognition to the facts of behavior. If we connect the forward reference of experience with the operations of our nascent activities, we have no need of a pure duration or of bridging the gulf between reality and its appearances. In the same way, if we construe sensations as just symbols of our responses, we rid ourselves of problems that are insoluble because they are unintelligible. Such problems constitute metaphysics in the bad sense of the word, whether they show themselves in the domain of science or of philosophy. To describe experience by reference to such a real is to explain what we know in terms of what we do not know. The question what is real is absolutely sterile. Our descriptions and explanations must remain on the same plane as the experiences with which they deal, and not seek after a real of a different order. If we are to have an explanation of consciousness at all, the explanation must not take us back to hypothetical sensations that are almost but not quite experienced, nor to a duration in which all distinctions are swallowed up, but must be rendered in terms of other facts that dwell in the light of common day. By way of conclusion I venture to urge once more that a proper consideration of the facts of behavior will furnish us with a key that will unlock many a door. The conception of stimulus and response gives us a differentia for experience and also enables us to distinguish within experience between consciousness and object. If, however, we disregard behavior, we are bound to lose our way. The distinction between the experienced and the unexperienced is either wiped out or else is permitted to convert itself into a distinction between appearance and reality that leads nowhere and explains nothing. The significance of truth as the successful guidance of behavior, in accordance with the program laid down in the organization of stimulus and response, is lost to sight and recourse is had to a fourth-dimensional truth or reality for the miracle of breathing life into the dead bones of our philosophic abstractions. The study of behavior constitutes a mode of approach that holds out the hope of deliverance from questions that should never have been asked. We are on a different and, let us hope, a higher level when we cease to ask how consciousness can lay hold of passive objects, or how knowledge _ueberhaupt_ is possible, and concern ourselves rather with the wondrous activity whereby this plastic dance of circumstance that we call the universe transcends the domain of mechanism and embodies itself in the values of conscious life. THE PHASES OF THE ECONOMIC INTEREST HENRY WALDGRAVE STUART