SECTION III.—THE COLON.
The Colon is used to separate those parts of a compound sentence, which are neither so closely connected as those which are distinguished by the semicolon, nor so little dependent as those which require the period.
RULE I.—ADDITIONAL REMARKS.
When the preceding clause is complete in itself, but is followed by some additional remark or illustration, especially if no conjunction is used, the colon is generally and properly inserted: as, "Avoid evil doers: in such society, an honest man may become ashamed of himself."—"See that moth fluttering incessantly round the candle: man of pleasure, behold thy image!"—Art of Thinking, p. 94. "Some things we can, and others we cannot do: we can walk, but we cannot fly."—Beanie's Moral Science, p. 112.
"Remember Heav'n has an avenging rod:
To smite the poor, is treason against God."—Cowper.
RULE II.—GREATER PAUSES.
When the semicolon has been introduced, or when it must be used in a subsequent member, and a still greater pause is required within the period, the colon should be employed: as, "Princes have courtiers, and merchants have partners; the voluptuous have companions, and the wicked have accomplices: none but the virtuous can have friends."—"Unless the truth of our religion be granted, a Christian must be the greatest monster in nature: he must at the same time be eminently wise, and notoriously foolish; a wise man in his practice, and a fool in his belief: his reasoning powers must be deranged by a constant delirium, while his conduct never swerves from the path of propriety."—Principles of Eloquence, p. 80.
"A decent competence we fully taste;
It strikes our sense, and gives a constant feast:
More we perceive by dint of thought alone;
The rich must labour to possess their own."—Young.
RULE III.—INDEPENDENT QUOTATIONS.
A quotation introduced without a close dependence on a verb or a conjunction, is generally preceded by the colon; as, "In his last moments, he uttered these words: 'I fall a sacrifice to sloth and luxury.'"—"At this the king hastily retorted: 'No put-offs, my lord; answer me presently.'"—Churchill's Gram., p. 367. "The father addressed himself to them to this effect: 'O my sons, behold the power of unity!'"— Rippingham's Art of Speaking, p. 85.