This diffidence is never more reasonable than in the perusal of the authors of antiquity; of those whose works have been the delight of ages, and transmitted as the great inheritance of mankind from one generation to another: surely, no man can, without the utmost arrogance, imagine that he brings any superiority of understanding to the perusal of these books which have been preserved in the devastations of cities, and snatched up from the wreck of nations; which those who fled before barbarians have been careful to carry off in a hurry of migration, and of which barbarians have repented the destruction. If in books thus made venerable by the uniform attestation of successive ages, any passages shall appear unworthy of that praise which they have formerly received, let us not immediately determine, that they owed their reputation to dulness or bigotry; but suspect at least that our ancestors had some reasons for their opinions, and that our ignorance of those reasons makes us differ from them. It often happens that an author's reputation is endangered in succeeding times, by that which raised the loudest applause among his contemporaries: nothing is read with greater pleasure than allusions to recent facts, reigning opinions, or present controversies; but when facts are forgotten, and controversies extinguished, these favourite touches lose all their graces; and the author in his descent to posterity must be left to the mercy of chance, without any power of ascertaining the memory of those things, to which he owed his luckiest thoughts and his kindest reception. On such occasions, every reader should remember the diffidence of Socrates, and repair by his candour the injuries of time: he should impute the seeming defects of his author to some chasm of intelligence, and suppose that the sense which is now weak was once forcible, and the expression which is now dubious formerly determinate. How much the mutilation of ancient history has taken away from the beauty of poetical performances, may be conjectured from the light which a lucky commentator sometimes effuses, by the recovery of an incident that had been long forgotten: thus, in the third book of Horace, Juno's denunciations against those that should presume to raise again the walls of Troy, could for many ages please only by splendid images and swelling language, of which no man discovered the use or propriety, till Le Fevre, by showing on what occasion the Ode was written, changed wonder to rational delight. Many passages yet undoubtedly remain in the same author, which an exacter knowledge of the incidents of his time would clear from objections. Among these I have always numbered the following lines: