Marley represents everything that's wrong with putting money before people. His famous chains aren't just scary props - they're a brilliant metaphor for how greed literally weighs down your soul. When he says "I wear the chain I forged in life... I made it link by link," Dickens shows us that every selfish choice builds our own punishment.

The list of objects in Marley's chains - cash-boxes, keys, padlocks, ledgers - represents his life's priorities. Notice how they're "wrought in steel," showing these aren't temporary consequences but eternal ones. This would've terrified Victorian readers who took heaven and hell very seriously.

Marley serves as Scrooge's dark mirror - basically showing him his own future if he doesn't change. When Marley warns "You will be haunted... without their visits you cannot hope to shun the path I tread," the word "shun" suggests Scrooge still has time to escape this fate.

Key Point: Marley's most powerful moment comes when he cries "Mankind was my business!" - showing that he now understands life should be about helping others, not hoarding wealth.

The beauty of Marley's character is how Dickens uses him to deliver the story's central message about social responsibility. His regret teaches both Scrooge and readers that true salvation comes through generosity and human connection, not material success.