The art work opens up in its own way the Being of beings. This opening up, i.e., this disconcealing, i.e., the truth of beings, happens in the work. In the art work, the truth of what is has set itself to work.
Art is truth setting itself to work.
There are three theories of truth. The correspondence theory of truth regards a proposition as true if it corresponds to what is the case. The coherence theory of truth regards a proposition as true if it is a necessary constituent of a systematically coherent whole. The pragmatic theory of truth regards a proposition as true if its satisfactory working has been verified by such conditions as may be stipulated. These theories of truth are predicable of logical propositions.