“The camera frame gives the illusion of being a window through which the photographer views the three-dimensional world, but negatives and prints are two-dimensional. In a photograph, the clouds, the horizon and the ground are all on the same plane. Our perceptual faculties can, of course, make three-dimensional sense of this spatial disparity while looking at a print. When making the photograph, you must be conscious of the fact that the objects in the picture will be flat shapes, and that you are responsible for the placement of these shapes within the frame. By changing your angle of view and viewpoint you can manoeuvre these forms around the frame almost as if they were cut-outs in a collage. ” ― Paul Hill, (‘Chapter One: Seeing and Thinking Photographically’, Approaching Photography, 2nd Edition, 2004, Photographers' Institute Press, ISBN 1 86108 323 8, p20)

— Approaching Photography by Paul Hill (Page 20)