During the work, you have to be sure that you haven't left any holes, that you've captured everything, because afterwards it will be too late.
Henri Cartier-BressonPhotography 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 โ and it can be subordinated, or he can be tyrannized by it.
Henri Cartier-Bresson