Aren't you getting tired of people hating one another? What do they think they get out of it? - Roger Ebert

The movie, as everyone knows, is about a man who finds himself living the same day over and over and over again. He is the only person in his world who knows this is happening, and after going through periods of dismay and bitterness, revolt and despair, suicidal self-destruction and cynical recklessness, he begins to do something that is alien to his nature. He begins to learn.

It considers not only how we relate to others, but how we relate to our ideas of others — so that a completely phony, non-human replica of a dead wife can inspire the same feelings that the wife herself once did. That is a peculiarity of humans: We feel the same emotions for our ideas as we do for the real world, which is why we can cry while reading a book, or fall in love with movie stars. Our idea of humanity bewitches us, while humanity itself stays safely sealed away into its billions of separate containers, or "people."

Fallacy of the Talking Killer. The villain wants to kill the hero. He has him cornered at gunpoint. All he has to do is pull the trigger. But he always talks first. He explains the hero's mistakes to him. Jeers. Laughs. And gives the hero time to think his way out of the situation, or be rescued by his buddy. Cf. most James Bond movies.