144. Paragraphing of Speech. In a narrative, each direct quotation, together with the rest of the sentence of which it is a part, should constitute a separate paragraph. This rule should be always followed in writing a conversation. Examine the following:
A certain Scotch family cherishes this anecdote of a trip which Dr. Samuel Johnson made to Scotland. He had stopped at the house of this family for a meal, and was helped to the national dish. During the meal the hostess asked:
"Dr. Johnson, what do you think of our Scotch broth?"
"Madam," was the answer, "in my opinion it is fit only for pigs."
"Then have some more," said the woman.
The only case in which the quoted words can be detached from the remainder of the sentence is where they form the end of the sentence after some introductory words, as in the second paragraph of the example just given.
145. Indentation of the Paragraph. The first sentence of each new paragraph should be indented. See example under §144. No other sentence should be so indented.
146. The essential qualities which each paragraph should have are: Unity, Coherence, and Emphasis.
Unity. Unity requires that the paragraph should deal with only one subject, and should include nothing which does not have a direct bearing on that subject. Thus, in the following paragraph, the italicized sentence violates the principle of Unity, because, very obviously it belongs to some other paragraph:
Never did any race receive the Gospel with more ardent enthusiasm than the Irish. St. Patrick, a zealous priest, was thought to have banished the snakes from the island. So enthusiastic were the Irish, that, not content with the religious work in Ireland, the Irish Church sent out its missionaries to Scotland, to Germany, and to the Alps and Apennines. It founded religious houses and monasteries....