"An example: if I compose a picture using as objects a scrap of bark, a scrap of butterfly wing and a purely imaginary form, you probably won't recognise the bark, or the butterfly wing, and you'll say: 'What does this stand for? It is an abstract picture. No it's a representational picture'.. .There is no such thing as 'abstract', or 'concrete' either. There is a good picture and a bad picture. There is the picture that moves you and the picture that leaves you cold.. .A picture has a value in itself, like a musical score, like a poem."