Ordinary language is all right.
One could divide humanity into two classes:
those who master a metaphor, and those who hold by a formula.
Those with a bent for both are too few, they do not comprise a class.
'The pedigree of psychological concepts: I strive not after exactness, but after a synoptic view.'
'On mathematics: "Your concept is wrong. - However, I cannot illumine the mater by fighting against your words, but only by trying to turn your attention away from certain expressions, illustrations, images, and towards the employment of the words."'
'(The philosopher is not a citizen of any community of ideas. That is what makes him into a philosopher.)'
'In philosophizing we may not terminate a disease of thought. It must run its natural course, and slow cure is all important. (That is why mathematicians are such bad philosophers.)'
'Popeye is still very much alive in oral tradition, but for some reason he chiefly features in verses which are obscene.'
- Iona and Peter Opie, The Lore and Language of Schoolchildren
(The author appears to take his own words to mind: 'The 'Contents' list of any great didactic work, such as the Summa Theologica of St. Thomas Aquinas, the Ethics of Spinoza, or the Ecclesiastical Polity of Hooker, will admirably illustrate this skeleton structure.')
Sometimes I like to think carefully about the contents page of a book. Some are more useful than others (some, because the works they introduce already have a more schematic structure):
Prose and Poetry - pure prose - interest.
Part I: Composition
Quality - sound - echo - onomatopoeia - alliteration - association - congruity - suggestion - use and disuse - jargon - affectation.
Appropriateness - necessity - complexity - metaphorical overtones.
III Metaphor and Other Figures of Speech
Limited function in prose - simple comparison - simile - analogy - illumination and decoration - riddles - kennings - other types of periphrasis - personification.
IV The Sentence
Its unity - construction - order of words - the period - balance - punctuation - rhythm - the aphorism.
V The Paragraph
Unity - liveliness - dignity - rhythm - configuration.
Instinctive: the essay - required effect - exordium.
Constructional: scaffolding - the novel.
Part II: Rhetoric
Reasoning - arrangement of ideas - emotional bias - system.
Active and passive - visual actuality - speed - concreteness - trimness - history - biography - travel.
IX Fantasy (Fancy)
Imagination and Fancy - objectivity and arbitrariness - the fairy tale - utopias - possibilities of fantasy.
X Imagination or Invention
Primary and secondary imagination - romanticism and classicism - decoration - duration - density.
Sensation or emotion plus thought - intuition - emotion and rhythm - simulated moods - mysticism - sincerity - empathy - the interior monologue.
Idiosyncracy - sensibility - sentimentality - humours - fluidity.
Elegance - wit - irony - words and ideas - the theme - false eloquence - persuasion - character.
Unity and predominating passion - the strain of address - taste - corporate sense - pattern - discipline - uniformity - universality.