I confess, in discourses where we seek rather pleasure and delight than information and improvement, such ornaments as are borrowed from [rhetorical handbooks] can scarce pass for faults [Arist. nobody uses fine language to teach geometry]. But yet if we would speak of things as they are, we must allow that all the art of rhetoric, besides order and clearness; all the artificial and figurative application of words eloquence hath invented, are for nothing else but to insinuate wrong ideas, move the passions, and thereby mislead the judgment.
John Locke
An Essay Concerning Human Understanding

Canons of Rhetoric: Style

Style is created by repeating conscious decisions regarding sentence structure and diction.Or is it the unconscious, spontanious, expression of an authentic self? The subject matter, the audience's expectations and needs, the genre, the occasion, and the ethos you wish to convey should all be considered when selecting a style. The ultimate goal is appropriateness: Match the style to the circumstances. Don't curse in a church or wax sermonic in a bar. Clinical terminology is inappropriate for love letters; business letters shouldn't sound like lawyers' briefs.

Traditionally there are three styles, high, middle, and low. High style is reserved for elevated subjects at important moments in formal settings. The middle style is for business transactions and instruction, while the low style is how one speaks at home or among friends. In the table below you will find a list of the characteristics typical of each style, but keep in mind that the categories are not rigid; there may be elements of one that work in another. You can bring low words into a high setting to relieve tension, seem more approachable, or show passion. If you bring high words into low places you will sound pretentious unless you manage to sound ironic or otherwise amusing.

The Three Styles of Prose
  High Middle or Plain Low
places senate, courthouse, civic center, church boardroom, office, school home, arena, bar, park
subjects politics, law, religion science, economics, technology, business daily life
goals inspire inform entertain, bond
diction Latinate standard vernacular, slang
sentences long, complex short, simple incomplete, simple, but sometimes also complex
rhythm iambic iambic ??
tone ritualistic, lofty neutral, plain friendly, familiar, scatological
metaphor for the sake of elevation for the sake of education for many reasons, for flash, flex, humor, can't find the right word
allusion literature, art, classical music, important events, history current events, sports, pop culture, pop music, workplace family, neighbors, friends
humor little, refined some, non-exclusionary lots, puns, jokes, anecdotes

More About the Middle or Plain Style -- Brevity and Clarity

Cicero is said to have said that "Brevity is a great charm of eloquence." Shakespeare's Hamlet observed that "brevity is the soul of wit." There's no denying that getting the words exactly right is the goal of all effective communicators. The problem is, brevity is a very small target. You have to do a lot of rhetorical work to say only exactly what needs saying. And there are risks. Horace (BCE 65) said it well, "I strive to be brief, and I become obscure." Brevity perfected is silence. To use an obvious transformation of the most common topic of all, at some point less is less. Most of the time, however, less is more (in the sense of better).

Wiki has a classical chreia about the laconic style, the terse, blunt, and elliptical style made famous by the Spartans.

For most kinds of professional discourse, whether academic or business, the middle (plain) style is preferable. The plain style uses simple, direct sentences constructed in a subject, verb, object word order, using only necessary adjectives. The diction is common so that readers do not have to look up words or infer their meaning from the context. The goal of such writing is to convey information efficiently. The writer and his or her words seem almost invisible to the reader.

Below is a list of plain style editorial practices

As with all recipes, salt to taste.

Practice, using a robotic style checker

See:
  • Clear and Simple as the Truth, The best book on style I've ever read.
  • The maxims of Diogenes
  • The maxims of La Rochefoucauld
  • Demetrius On Style
  • Ad Herennium, book 4

    Because rhetoric is the art of proving opposites, if one knows something of brevity, one should also learn something of copiousness. The Renaissance scholar Desideris Erasmus of Rotterndam wrote a book on that very subject: De Copia or of Words and Ideas