Photography visually educates us about things we may otherwise not know, due to our own proximity, and sense of shelter. Photographs may invoke compassion, understanding, and knowledge about things outside our daily lives. I think Dorothea Lange was good at creating awareness and invoking compassion, due not only to her talent, but also her passion. "Pick a theme and work it to exhaustion...the subject must be something you truly love or truly hate. - Dorothea Lange