The Poem "The Rime of the Ancient Mariner" is based on the concept of sin and regeneration? Justify.

Coleridge's "The Rime of the Ancient Mariner" features a
protagonist that loses his former self and his shipmates due to a casually careless and
cruel act, and is led to regeneration by his losses.

The
Mariner is not intentionally cruel.  He kills the albatross on a whim.  He just doesn't
respect nature as part of existence and God's creation.  Natural forces, in the form of
the supernatural, teach him a lesson.  By the time he accosts the wedding guest he knows
better than to disrespect nature.  His purpose, in fact, in cornering people and telling
them his story is to convince them to respect all of God's creatures.  He suffers loss
and is led to regeneration. 

The wedding guest, too,
undergoes a bit of a transformation and regeneration.  He is dismissive of and
disrespectful to the Mariner at the beginning of the poem, but subdued and passive after
he is forced to listen to the tale.  Thus, the possibility of regeneration does
exist--the Mariner and the guest demonstrate this. 

The
Mariner's intent, his message, is in some ways an old one, of course.  Yet Coleridge
avoids being didactic (preachy) by altering the traditional Christian message from faith
and following God to loving and respecting nature.  Humans need to repent their lack of
respect of all of nature, not their lack of faith in God.  He also avoids being didactic
by creating a work of outlandish imagination, full of supernatural
beings.