(A proofreader's note regarding “farther” and “further”)

Though “farther” and “further” have vowels distinct,

Their functions and meanings are mostly the same;

They both serve as adjective, adverb as well,

Comparatives of “far” although different in name.

As adverbs, their senses are equally used,

Relating to literal and figurative spans.

They say “to a greater degree or extent,”

Or “at or as far as a point that's advanced.”

“More distant” is one sense the adjectives have;

Another is “going/extending beyond.”

This latter from “farther” has sought to abscond,

Discovering with “further” a much stronger bond.

This meaning, “additional,” is one of the points

Where “farther” and “further” are different in use.

There's also the adverb, conjunctive in type:

“Moreover,” “in addition,” whichever you choose.

Despite being like “farther” in much of its usage,

“Further” is favored when distance is absent.

Of interest as well is that more parts of speech

Are given to “further” by common assent.

“We run ever farther to further our joy,

Proceeding most strongly and, further, with verve.

We further the skeptics or simply annoy,

But all will be certain that farther's no verb.

“Remember that further is broader in scope,

'Additional,' 'moreover,' both there in its clime.

When ‘far’ is compared by extent or degree,

Then further beats farther, its reach more sublime.”