Urns contain the remains of someone. Maybe the urn represents the "story" of what is contained inside it?

Contradictions may be a much easier component of literature to spot, but what does it mean to metaphorically use language, other than to use a metaphor?

Examining open ends of the text? Perhaps seeing how the author leaves details to the reader contributes to the text just as much as the given details.

Heresy is often used in religious (mainly catholic) scenarios where one acts against the church and its beliefs. Seeing it used in terms of literature frames it in a more religious and serious way by people who firmly believe in literature.

Letting emotion and opinion into consideration of a work's meaning can skew and bias what their interpreted meaning is.

Literature should be observed and analyzed in a vacuum, isolated from other references unless needed to understand what is being said.

Different works of literature will have different meaning depending on the reader and their knowledge/experience.

The "unity" of the work contributes to its meaning.

The urn remains a metaphor for what literature contains, and analyzing the literature clarifies its value.

Different elements of the story do contribute to the direction and unity of a work. Now I learned that looking at it in this perspective is New Criticism.

So the urn in this case simply contains and preserves that poetic meaning.

Metaphysical poet? As in spiritual...?