But we must now consider what number like so many dashes of purple, should tincture and enrich the rest, and to what species of style they are each of them best adapted. The iambic, then, should be the leading number in those subjects which require a plain and simple style;--the paeon in such as require more compass and elevation; and the dactyl is equally applicable to both. So that in a discourse of any length and variety, it will be occasionally necessary to blend and intermingle them all. By this means, our endeavours to modulate our periods, and captivate the ear, will be most effectually concealed; especially, if we maintain a suitable dignity both of language and sentiment. For the hearer will naturally attend to these (I mean our words and sentiments) and to them alone attribute the pleasure he receives; so that while he listens to these with admiration, the harmony of our numbers will escape his notice: though it must indeed be acknowledged that the former would have their charms without the assistance of the latter. But the flow of our numbers is not to be so exact (I mean in prose, for in poetry the case is different) as that nothing may exceed the bounds of regularity; for this would be to compose a poem. On the contrary, if our language neither limps nor fluctuates, but keeps an even and a steady pace, it is sufficiently _numerous_; and it accordingly derives the title, not from its consisting entirely of numbers, but from its near approach to a numerous form. This is the reason why it is more difficult to make elegant prose, than to make verses; because there are fixed and invariable rules for the latter; whereas nothing is determined in the former, but that the current of our language should be neither immoderate nor defective, nor loose and unconfined. It cannot be supposed, therefore, to admit of regular beats and divisions, like a piece of music; but it is only necessary that the general compass and arrangement of our words should be properly restrained and limited,--a circumstance which must be left entirely to the decision of the ear.