Taken as a light comedy, this movie would rate perhaps eight stars out of ten. But it's much, much more than just a light comedy. It is, in fact, utterly unique. The character of Phil Connors, played by Bill Murray, is, quite literally, a man without a future.

What do we gain from watching this movie? Different people will take away different things from it. I discovered two very important truths in Groundhog Day.

One was the importance of concentrating on the things that last. Phil Connors must live the same day over and over again, and is forced to realize that the only real change that will ever be possible must happen within himself. (From this it is a short leap to the realization that this is the only kind of change that really matters; for in his case, it is literally true.) It is at this point that he takes up piano, begins reading, learns to ice-sculpt. But if it weren't for his unique predicament, he never would have realized this; in his routine at the TV studio back in Pittsburgh, we surmise, there was always something changing...and not changing. (It is interesting that Phil is a weatherman: the weather is a perfect metaphor for something that changes constantly...without, in the long term, changing at all.) We can be distracted by the superficial changes in the world around us, and forget that real change in our lives must come from within. This was the great gift of Groundhog Day for Phil Connors: the chance to discover this truth for himself.

The other thing I noticed, while reflecting on this movie, is how uncertainty can keep us from charitable acts. We use our ignorance like a crutch: we don't give to charity because it may be a scam, we don't offer to help someone because they may not need help anyway, and so on. But Phil doesn't have the luxury of ignorance. He knows...he knows with absolute certainty that if he doesn't buy the old man a bowl of soup, that man will die in the streets within a few hours. He knows that if he isn't on hand at the right time, a boy will fall from a tree and break his neck. Faced with such knowledge, even Phil, self-absorbed as he is, cannot stand by idly. Nor could we, in his position. This is a powerful argument for knowledge as the most reliable foundation for generous behavior. What other movie can offer an insight half so profound?

Many more truths can be mined from this movie. As others have said, this is a thought experiment that went very well indeed--better than anything I've ever seen on the Big Screen. As such, I'd vote for it as one of the greatest movies ever made, and very likely the most underrated movie ever made.