Art is an amazing, insane thing. It's a form of translation/transition. Take a painter(or any artist for that matter). He looks at a thing, then he recovers the data that it created in his brain, and via the transfer of energy (neuron impulses to muscle action while painting) he creates a painting, an echo of the thing he saw, an echo of an exact moment in time and certain arrangement of atoms. Then we look at it, and new data is born inside our heads, an energy recreated. Kind of like time travelling machine. What a flow.
Let's go even deeper now. Imagine a writer. He creates a story in his head, and writes a book using letters, that build words. Words are an artificial creation of men, that trigger a certain images in our heads. I see it kind of like Pavlov's dog situation- -think of a parent showing an apple to a child, and teaching him that this is an "apple". Kid looks at it, repeats the word, and connects the image, smell, facture to this mashup of letters - "apple". Later, when there's no apple, but the word is present, this child imagines an apple in his head. Everything that's written and read behaves like that. Words are a glimpse of real things, encoded in our brains.