What is the theme of "The Rime of the Ancient Mariner"?

How do you know?

Theme:

Example 1 to show this is the theme:

Example 2:

The theme or underlying meaning of the poem, therefore, is to show how one gets out from under a sin against God. The poem shows that this happens through the redemptive power of the imagination, an important Romantic theme. The Mariner is guilty of killing the albatross.