What is the meaning of the film? It seeks to put on the screen the drama of man's inability to communicate with his fellow man. The economic condition of Umberto is not what concerns us. What concerns us is the loneliness of an old man. Men do not communicate with each other; how can they communicate with Umberto?
...
Human beings have this primitive, perennial, ancient fault of not understanding one another, of not communicating with each other. This is the story of Umberto.D——that is to say, of a man like ourselves.