Many causes may vitiate a writer's judgement of his own works. On that which has cost him much labour he sets a high value, because he is unwilling to think that he has been diligent in vain: what has been produced without toilsome efforts is considered with delight as a proof of vigorous faculties and fertile invention; and the last work, whatever it be, has necessarily most of the grace of novelty.
Prefaces, Biographical and Critical, to the Works of the English Poets: Milton. Butler (ed. 1779)