Photography must seize upon this moment and hold immobile the equilibrium of it. The photographers eye is perpetually evaluating. A photographer can bring coincidence of line simply by moving his head a fraction of a millimeter. He can modify perspectives by a slight bending of the knees. By placing the camera closer to or farther from the subject, he draws a detail — and it can be subordinated, or he can be tyrannized by it.
Henri Cartier-BressonOnly a fraction of the camera's possibilities interests me - the marvelous mixture of emotion and geometry, together in a single instant.
Henri Cartier-Bresson