He said it better than I ever could...

" Photography is an instantaneous operation, both sensory and intellectual, an expression of the world in visual terms, and also a perpetual quest and interrogation. It is one and the same time the recognition of fact in a fraction of a second and the rigorous arrangement of the forms visually percieved wich give to the fact expression and significance."

Henri Cartier Bresson (1908 - 2004)