[Footnote: _Call'd by thy voice_, l. 299. The numerous trains of associated ideas are divided by Mr. Hume into three classes, which he has termed contiguity, causation, and resemblance. Nor should we wonder to find them thus connected together, since it is the business of our lives to dispose them into these three classes; and we become valuable to ourselves and our friends as we succeed in it. Those who have combined an extensive class of ideas by the contiguity of time or place, are men learned in the history of mankind, and of the sciences they have cultivated. Those who have connected a great class of ideas of resemblances, possess the source of the ornaments of poetry and oratory, and of all rational analogy. While those who have connected great classes of ideas of causation, are furnished with the powers of producing effects. These are the men of active wisdom who lead armies to victory, and kingdoms to prosperity; or discover and improve the sciences which meliorate and adorn the condition of humanity.] "Call'd by thy voice Resemblance next describes Her sister-thoughts in lucid trains or tribes; Whence pleased Imagination oft combines By loose analogies her fair designs; Each winning grace of polish'd wit bestows To deck the Nymphs of Poetry and Prose. 310 [Footnote: _Polish'd wit bestows_, l. 309. Mr. Locke defines wit to consist of an assemblage of ideas, brought together with quickness and variety, wherein can be found any resemblance or congruity, thereby to make up pleasant pictures and agreeable visions in the fancy. To which Mr. Addison adds, that these must occasion surprise as well as delight; Spectator, Vol. I. No. LXII. See Note on Canto III. l. 145. and Additional Note, VII. 3. Perhaps wit in the extended use of the word may mean to express all kinds of fine writing, as the word Taste is applied to all agreeable visible objects, and thus wit may mean descriptive sublimity, beauty, the pathetic, or ridiculous, but when used in the confined sense, as by Mr. Locke and Mr. Addison as above, it may probably be better defined a combination of ideas with agreeable novelty, as this may be effected by opposition as well as by resemblance.] "Last, at thy potent nod, Effect and Cause Walk hand in hand accordant to thy laws; Rise at Volition's call, in groups combined, Amuse, delight, instruct, and serve Mankind; Bid raised in air the ponderous structure stand, Or pour obedient rivers through the land; With cars unnumber'd crowd the living streets, Or people oceans with triumphant fleets.