Laymen learn to read photographs the way they do headlines, skipping over them quickly to get the gist of what is being said. Photographers, on the other hand, study them with the care and attention to detail one might give to a difficult scientific paper or a complicated poem.

The “normal” person, when he discovers a deviant impulse in himself, is able to check that impulse by thinking of the manifold consequences acting on it would produce for him. He has staked too much on continuing to be normal to allow himself to be swayed by unconventional impulses.