"If you start cutting or cropping a good photograph, it means death to the geometrically correct interplay of proportions. Besides, it very rarely happens that a photograph which was feebly composed can be saved by reconstruction of its composition under the darkroom’s enlarger; the integrity of vision is no longer there." Henri Cartier-Bresson
Interesting quote. Hard to disagree with the first sentence, since he is simply saying that if a photograph is perfectly composed in camera you won't improve it later. I find the second less persuasive as a generalisation, although of course entirely deserving of respect as an account of Cartier-Bresson's practice. Enlargers offered less, or less accessible, scope for creative play with an image than software, and I don't see why it isn't be possible to create a "geometrically correct interplay of proportions", or several of them, on screen, where none is present in the original. As for "integrity of vision", I don't see why it might not come into play while working on an image as well as when you press the button. In the end surely there are different ways of "doing photography", and only the result matters, although every photographer will have, and be attached to, his or her own distinctive approach.