We must therefore use some illusion to render a pastoral delightful; and this consists in exposing the best side only of a shepherd's life, and in concealing its miseries. Nor is it enough to introduce shepherds discoursing together in a natural way; but a regard must be had to the subject--that it contain some particular beauty in itself, and that it be different in every eclogue. Besides, in each of them a designed scene or prospect is to be presented to our view, which should likewise have its variety. This variety is obtained in a great degree by frequent comparisons, drawn from the most agreeable objects of the country; by interrogations to things inanimate; by beautiful digressions, but those short; sometimes by insisting a little on circumstances; and lastly, by elegant turns on the words, which render the numbers extremely sweet and pleasing. As for the numbers themselves, though they are properly of the heroic measure, they should be the smoothest, the most easy and flowing imaginable. It is by rules like these that we ought to judge of pastorals. And since the instructions given for any art are to be delivered as that art is in perfection, they must of necessity be derived from those in whom it is acknowledged so to be. It is therefore from the practice of Theocritus and Virgil (the only undisputed authors of pastoral) that the critics have drawn the foregoing notions concerning it. Theocritus excels all others in nature and simplicity. The subjects of his 'Idyllia' are purely pastoral; but he is not so exact in his persons, having introduced reapers and fishermen as well as shepherds. He is apt to be too long in his descriptions, of which that of the cup in the first pastoral is a remarkable instance. In the manners he seems a little defective, for his swains are sometimes abusive and immodest, and perhaps too much inclining to rusticity; for instance, in his fourth and fifth 'Idyllia.' But 'tis enough that all others learnt their excellencies from him, and that his dialect alone has a secret charm in it, which no other could ever attain. Virgil, who copies Theocritus, refines upon his original: and in all points where judgment is principally concerned, he is much superior to his master. Though some of his subjects are not pastoral in themselves, but only seem to be such, they have a wonderful variety in them, which the Greek was a stranger to. He exceeds him in regularity and brevity, and falls short of him in nothing but simplicity and propriety of style; the first of which perhaps was the fault of his age, and the last of his language.