Shakespeare had no tutors but nature and genius. He caught his faults from the bad taste of his contemporaries. In an age still less civilized Shakespeare might have been wilder, but would not have been vulgar.
Shakespeare, with an improved education and in a more enlightened age, might easily have attained the purity and correction of Racine; but nothing leads one to suppose that Racine in a barbarous age would have attained the grandeur, force and nature of Shakespeare.