to show that [the success of my portray-] photographs was not due to subject matter – not to special trees or faces, or interiors, to special privileges – clouds were there for everyone... I wanted to photograph clouds to find out what I had learned in forty years about photography. Through clouds to put down my philosophy of life... My aim is increasingly to make my photographs look so much like photographs that unless one has eyes and sees, they won't be seen – and still everyone will never forget them having once looked at them.