he provision of the Constitution is: "No tax or duty shall be laid on articles exported from any state."
Quotations grammatically in apposition or the direct objects of verbs are preceded by a comma and enclosed in quotation marks.
I recall the maxim of La Rochefoucauld, "Gratitude is a lively sense of benefits to come."
Aristotle says, "Art is an imitation of nature."
Quotations of an entire line, or more, of verse, are begun on a fresh line and centred, but not enclosed in quotation marks.
Wordsworth's enthusiasm for the Revolution was at first unbounded:
Bliss was it in that dawn to be alive,
But to be young was very heaven!
Quotations introduced by that are regarded as in indirect discourse and not enclosed in quotation marks.
Keats declares that beauty is truth, truth beauty.
Proverbial expressions and familiar phrases of literary origin require no quotation marks.
These are the times that try men's souls.
He lives far from the madding crowd.
The same is true of colloquialisms and slang.

References. In scholarly work requiring exact references, abbreviate titles that occur frequently, giving the full forms in an alphabetical list at the end. As a general practice, give the references in parenthesis or in footnotes, not in the body of the sentence. Omit the words act, scene, line, book, volume, page, except when referring by only one of them. Punctuate as indicated below.
In the second scene of the third act In III.ii (still better, simply insert III.ii in parenthesis at the proper place in the sentence)
After the killing of Polonius, Hamlet is placed under guard (IV. ii. 14).
2 Samuel i:17-27 Othello II.iii 264-267, III.iii. 155-161
Titles. For the titles of literary works, scholarly usage prefers italics with capitalized initials. The usage of editors and publishers varies, some using italics with capitalized initials, others using Roman with capitalized initials and with or without quotation marks. Use italics (indicated in manuscript by underscoring), except in writing for a periodical that follows a different practice. Omit initial A or The from titles when you place the possessive before them.
The Iliad; the Odyssey; As You Like It; To a Skylark; The Newcomes; A Tale of Two Cities; Dicken's Tale of Two Cities.
V. Words and Expressions Commonly Misused

(Many of the words and expressions here listed are not so much bad English as bad style, the commonplaces of careless writing. As illustrated under Feature, the proper correction is likely to be not the replacement of one word or set of words by another, but the replacement of vague generality by definite statement.)
All right. Idiomatic in familiar speech as a detached phrase in the sense, "Agreed," or "Go ahead." In other uses better avoided. Always written as two words..
As good or better than. Expressions of this type should be corrected by rearranging the sentence.
My opinion is as good or better than his. My opinion is as good as his, or better (if not better).◎本◎作◎品◎由◎◎網◎友◎整◎理◎上◎傳◎
As to whether. Whether is sufficient; see under Rule 13.
Bid. Takes the infinitive without to. The past tense is bade.
Case. The Concise Oxford Dictionary begins its definition of this word: "instance of a thing's occurring; usual state of affairs." In these two senses, the word is usually unnecessary.
In many cases, the rooms were poorly ventilated. Many of the rooms were poorly ventilated.
It has rarely been the case that any mistake has been made. Few mistakes have been made.
See Wood, Suggestions to Authors, pp. 68-71, and Quiller-Couch, The Art of Writing, pp. 103-106.
Certainly. Used indiscriminately by some speakers, much as others use very, to intensify any and every statement. A mannerism of this kind, bad in speech, is even worse in writing.
Character. Often simply redundant, used from a mere habit of wordiness.
Acts of a hostile character Hostile acts
Claim, vb. With object-noun, means lay claim to. May be used with a dependent clause if this sense is cl