“Yet great labour, directed by great abilities, is never wholly lost; if they frequently threw away their wit upon false conceits, they likewise sometimes struck out unexpected truth: if their conceits were far-fetched, they were often worth the carriage. To write on their plan, it was at least necessary to read and think. No man could be born a metaphysical poet, nor assume the dignity of a writer, by descriptions copied from descriptions, by imitations borrowed from imitations, by traditional imagery, and hereditary similes, by readiness of rhyme, and volubility of syllables.
In perusing the works of this race of authors, the mind is exercised either by recollection or inquiry; something already learned is to be retrieved, or something new is to be examined. If their greatness seldom elevates, their acuteness often surprises; if the imagination is not always gratified, at least the powers of reflection and comparison are employed; and in the mass of materials which ingenious absurdity has thrown together, genuine wit and useful knowledge may be sometimes found buried perhaps in grossness of expression, but useful to those who know their value; and such as, when they are expanded to perspicuity, and polished to elegance, may give lustre to works which have more propriety though less copiousness of sentiment.”
—Samuel Johnson, Life of Cowley (1779)
Quoted from The Sacred Wood: Essays on Poetry and Criticism by T.S. Eliot