The treatment of the subject is considered to be more important than the subject itself. - Arthur Hammond

...but the fundamental element of picture-making is the cutting of the picture-space by lines or edges of tones, and this is what is known as "spacing".

The areas of tones are called masses and, whatever the subject of picture may be, its success as a picture depends very largely on the effectiveness of the spacing and massing.

So photography, having a place among artistic processes, has its own distinguishing quality which cannot be duplicated by any other medium.