The sign is arbitrarily constructed, to put it another way. There is no correlation between signified and signifier. The objective correlative does exist, but only in as many different forms as there are readers. Every reader defines the text and so every text is a failure, as it will never convey the writer's true message to the reader. It will never be perfect although it will continue to try.
Metaphor carries the text to literature.
Without metaphor there is no literature. Literature must be defined as what causes the reader to think. Metaphor will always present a problem to the reader who will then try to solve the problem of understanding the metaphor. Every text is based upon juxtapositions and opposites. And that is what I tentatively call Tinka's Poetics .