What reinforces the content of a photograph is the sense of rhythm - the relationship between shapes and values.
Henri Cartier-BressonThink about the photo before and after, never during. The secret is to take your time. You mustn't go too fast. The subject must forget about you. Then, however, you must be very quick.
Henri Cartier-BressonPhotography is simultaneously and instantaneously the recognition of a fact and the rigorous organization of visually perceived forms that express and signify that fact
Henri Cartier-Bresson