Unlike science, which reflects the world in terms, art reflects and expresses in images. In one of his conversations about the work Fils naturel, the great French encyclopedist Diderot described the beautiful in art as "the harmony between image and object". The deeper and clearer the painting reflects the essential aspects of the object, the greater its beauty, its artistic value. The artist of the word has his object in the whole environment that surrounds him, in the whole of social relations and in himself as one member of the parts of that whole, as a component of that part, that is, of a certain social class.