Read the excerpt from common sense.

“there are injuries which nature cannot forgive; she would cease to be nature if she did.”

paine uses this language to show that
the king deserves punishment for his behavior toward the colonies.
the king’s oppressive actions against the colonies are inexcusable.
the colonists will mend their relationship with the king if he promises them independence.
the colonies will eventually heal from the wounds inflicted by the king.

Paine uses this language to show that kings oppressive actions against the colonies are inexcusable.

Explanation:

This is because the kings have been treating the colonies in the brutal manner and she is not in support of the kings for such behaviour. She thus tries to show a sense and a feeling of oppression with the use of such strong words against the king so that her message is spread across. There are certain injuries which are not even forgiven by nature and the deeds done by kings are the same.

its repetition emphasizing that the chain is his own. sorry if i am wrong.