Thus spake Messr. Cartier-Bresson:
For us the camera is a tool, the extension of our eye, not a pretty little mechanical toy. It is sufficient that we should feel at ease with the camera best adapted for our purpose. Adjustments of the camera – such as setting the aperture and the speed – should become reflexes, like changing gear in a car. The real problem is one of intelligence and sensitivity.
And -
The difference between a good picture and a mediocre picture is a question of millimetres – small, small difference. But it’s essential. I don’t think there’s so much difference between photographers, but it’s that little difference that counts, maybe.