If You Had A Twin, But Didn't Realise...
Family Life9 mins ago
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For more on marking an answer as the "Best Answer", please visit our FAQ.I think there are probably several different interpretations, but I've always thought that the building itself or the malevolent spirit which lurked there was taking over Nicholson's mind. At the end of the film, Nicholson becomes part of the building's fabric. The picture is a representation of, or the remains of, all those guests and staff who were similarly taken, the "ghosts" of the hotel. Nicholson is trapped in the hotel for ever, probably endlessly visiting the bar as he does in one bizarre dream sequence.
It's probably a good idea not to try to think the significance through too much; almost alone amongst American directors, Kubrick was not keen on serving up pat Hollywood stories, particularly in his later films as you can see in, say, 2001: A Space Odyssey. The Shining is a highly creepy film, but it's not an episode of the Twilight Zone, and I reckon in the end it's best to just go with the flow.