lost finale: what do jacob and the man in black really represent?

Jen

New member
I get the idea that jack and co. survived the plane crash, and that everything that happened on the island was reality (versus the flash-sideways which was a sort of purgatory existence). But, what I'm still wondering is what Jacob and the man in black are supposed to represent? Did Jacob bring the plane to the island? What is the island? Just when I think I'm starting to understand I feel "LOST" again!?!?!
 
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