The comparison is the converse of that in the Bible, Matthew xvii., 2, Revelations I., 16, where the countenance of Christ glorified is said to shine "as the sun" (Sykes).
98--*uprist*.

This word was used in Middle English as a noun, and regularly as the 3d pers.sing.pres.ind.of the verb "uprise." In "The Reves Tale" line 329, however, Chaucer uses, it in a context of past tenses, as Coleridge does here, as if it were a weak preterit; and Chaucer uses "rist up" in the same way several times (Sykes).
104--*The furrow followed free*.

This was changed in "Sibylline Leaves" to "The furrow streamed off free," because, Coleridge tells us, "from the ship itself the _Wake_ appears like a brook flowing off from the stern." In the case of modern steamboats at least it would be more correct to say that the wake, as seen from the stern of the boat, looks like a brook _following_ the boat.

The original reading was restored in the editions of 1828 and 1829.
7, 123--*The very deep did rot*, etc.

The ship becalmed in tropic seas, and the slimy things engendered there, were a vision in Coleridge's mind before "The Ancient Mariner" was thought of.