Of course there are some subjects for which Metaphor should not be used. See (14 a) and (14 b).
14. Do not confuse Metaphor.
"In a moment the thunderbolt was upon them, deluging their country with invaders."
The following is attributed to Sir Boyle Roche: "Mr. Speaker, I smell a rat, I see him brewing in the air; but, mark me, I shall yet nip him in the bud."
Some words, once metaphorical, have ceased to be so regarded. Hence many good writers say "under these circumstances" instead of "in these circumstances."
An excessive regard for disused metaphor savours of pedantry: disregard is inelegant. Write, not, "unparalleled complications," but " unprecedented complications;" and "he threw light on obscurities," instead of "he unravelled obscurities."
14 a. Do not introduce literal statement immediately after Metaphor.
"He was the father of Chemistry, and brother to the Earl of Cork."
"He was a very thunderbolt of war,
And was lieutenant to the Earl of Mar."
14 b. Do not use poetic metaphor to illustrate a prosaic subject. Thus, we may say "a poet soars," or even, though rarely, "a nation soars to greatness," but you could not say "Consols soared to 94½." Even commonplace subjects may be illustrated by metaphor: for it is a metaphor, and quite unobjectionable, to say "Consols mounted, or jumped to 94½." But commonplace subjects must be illustrated by metaphor that is commonplace.
ORDER OF WORDS IN A SENTENCE.
15. Emphatic words must stand in emphatic positions; i.e. for the most part, at the beginning or at the end of the sentence. This rule occasionally supersedes the common rules about position. Thus, the place for an adverb, as a rule, should be between the subject and verb: "He quickly left the room;" but if quickly is to be emphatic, it must come at the beginning or end, as in "I told him to leave the room slowly, but he left quickly."
Adjectives, in clauses beginning with "if" and "though," often come at the beginning for emphasis: "Insolent though he was, he was silenced at last." ...