Although I am not literally blind, I compare depression to blindness. From what I understand, there is a large percentage of blind people who develop a higher sense of smell and hearing. As tough as depression is, and as tough as it can be to keep at bay, I believe that along the way other mental senses have been heightened. Although I don't recommend people rush out to try to become depressed, those of us with this disorder can find a silver lining in it if you look hard enough. To me this is nature's way of keeping a sort of balance in us and all living things.