"I wear the chain I created in life," says Scrooge in A Christmas Carol (Stave 1). "And so should you."
This is one of several references to chains in the story. The first mention of chains occurs when Marley tells his father that he has been "a kind of phantom in these dwelling-places" (Page 3). Later, after Marley has died, Ebenezer tells Mrs. Fezziwig that her son was "a young man in his chains" (Page 18). Finally, Jacob Marley appears before Scrooge and warns him that he must "weep, weep, weep", for there will be "no solace for your weeping" (Page 19).
In each case, a chain is mentioned as an object that binds someone or something. Thus, it can be inferred that Marley believed he was bound by the chain he had made himself. Likewise, Ebenezer claims that his son was bound by the chain he had forged in life. Last, but not least, Scrooge believes that he is bound by the chain he has forged in life.
It's important to note that all three characters refer to chains they have forged in life.
Marley's appearance warns Scrooge of his potential fate. "I wear the chain I forged in life," replied the Ghost. I made it link by link, yard by yard; I girded it on of my own free will, and I wore it of my own free will. Marley explains the justice in his everlasting punishment.
In this line, Marley is saying that he is responsible for his own death. He killed James before he died and therefore deserves to die too. This shows that you should never betray someone else's trust. Also, it means that you should use your freedom responsibly.
It is a chain formed of "steel cash-boxes, keys, padlocks, ledgers, deeds, and hefty purses." These represent Marley's self-centered, covetous, and obsessive nature. It symbolizes a message that Scrooge will only receive through the things he cherishes the most: money and wealth.
Marley's ghost returns to warn Scrooge that unless he changes his ways he will end up like him - alone and dead.
This phrase has many interpretations depending on the context. But it usually means that your actions in life will have an impact on others, and that you should consider those effects when planning your future behavior.
For example, if I forge a chain with my friends then play games with them until dawn, we will have a very intense night full of laughter and fun. However, I might become tired and forget about some things such as homework or chores. In this case, my behavior will affect others, and I should consider how my plans will influence them before acting.
Also, a chain is a connection between two objects or people. So, this phrase can be used to show that your past actions will affect your future relationships. For example, if you use drugs regularly and act inappropriately with women then they will probably leave you. This is because other people's feelings are more important than yours, so don't risk losing them for money or fame.