Take a look at this picture for a moment or two:
This is a picture of my great grandfather, his first wife, and their young family. My grandfather is the little boy standing closest to my great grandfather. Look at how beautifully everyone is dressed. Gladys, the little girl standing on the left, will have died from tuberculosis in 1933.
This picture was taken, I believe, in 1915. It was taken as the last family photo, before my great grandmother died from tuberculosis. The entire family knows that she is dying.
Now, take another look.