Impressionism has induced the study of what we see and shown us that we all see differently; it has done good to photography by showing that we should represent what we see and not what the lens sees . . . What do we see when we go to Nature? We see exactly what we are trained to see, and, if we are lucky, perhaps a little more but not much . . . We see what we are prepared to see and on that I base a theory that we should be very careful what we learn.