Ver. 141. _Some beauties yet no precepts can declare, &c._] Our author, in these two general directions for studying nature and her commentators, having considered poetry as it is, or may be reduced to rule, lest this should be mistaken as sufficient to attain perfection either in writing or judging, he proceeds from ver. 140 to 201, to point up to those sublimer beauties which rules will never reach, nor enable us either to execute or taste,--beauties, which rise so high above all precept as not even to be described by it; but being entirely the gift of heaven, art and reason have no further share in them than just to regulate their operations. These sublimities of poetry (like the mysteries of religion, some of which are above reason, and some contrary to it) may be divided into two sorts, such as are above rules, and such as are contrary to them. Ver. 146. _If, where the rules, &c._] The first sort our author describes from ver. 145 to 152, and shows that where a great beauty is in the poet's view, which no stated rules will authorise him how to reach, there, as the purpose of rules is only to attain an end like this, a lucky licence will supply the place of them: nor can the critic fairly object, since this licence, for the reason given above, has the proper force and authority of a rule. Ver. 152. _Great wits sometimes may gloriously offend, &c._] He describes next the second sort, the beauties against rule. And even here, as he observes, from ver. 151 to 161, the offence is so glorious, and the fault so sublime, that the true critic will not dare either to censure or reform them. Yet still the poet is never to abandon himself to his imagination. The rules laid down for his conduct in this respect are these: 1. That though he transgress the letter of some one particular precept, yet that he be still careful to adhere to the end or spirit of them all, which end is the creation of one uniform perfect whole. And 2. That he have, in each instance, the authority of the dispensing power of the ancients to plead for him. These rules observed, this licence will be seldom used, and only when he is compelled by need, which will disarm the critic, and screen the offender from his laws.