Try the experiment of communicating, with fullness and accuracy, some experience to another, especially if it be somewhat complicated, and you will find your own attitude toward your experience changing; otherwise you resort to expletives and ejaculations. Except in dealing with commonplaces and catch phrases one has to assimilate, imaginatively, something of another's experience in order to tell him intelligently of one's own experience. All communication is like art.[40] Not only does communication involve the creation, out of experiences that are individual and private, of an experience that is common and public but such a common experience becomes the basis for a common and public existence in which every individual, to greater or less extent, participates and is himself a part. Furthermore, as a part of this common life, there grows up a body of custom, convention, tradition, ceremonial, language, social ritual, public opinion, in short all that Sumner includes under the term "mores" and all that ethnologists include under the term "culture." The thing that characterizes Durkheim and his followers is their insistence upon the fact that all cultural materials, and expressions, including language, science, religion, public opinion, and law, since they are the products of social intercourse and social interaction, are bound to have an objective, public, and social character such as no product of an individual mind either has or can have. Durkheim speaks of these mental products, individual and social, as representations. The characteristic product of the individual mind is the percept, or, as Durkheim describes it, the "individual representation." The percept is, and remains, a private and an individual matter. No one can reproduce, or communicate to another, subjective impressions or the mental imagery in the concrete form in which they come to the individual himself. My neighbor may be able to read my "thoughts" and understand the motives that impel me to action better than I understand myself, but he cannot reproduce the images, with just the fringes of sense and feeling with which they come to my mind. The characteristic product of a group of individuals, in their efforts to communicate is, on the other hand, something objective and understood, that is, a gesture, a sign, a symbol, a word, or a concept in which an experience or purpose that was private becomes public. This gesture, sign, symbol, concept, or representation in which a common object is not merely indicated, but in a sense created, Durkheim calls a "collective representation."