The just amount of this claim plainly cannot be for more than the rate of excellence which he had reached in his former production; but, in estimating this rate, various errors are perpetually committed, which increase the difficulties of the task which is thus imposed on him. In the _first_ place, the comparative amount of his past and present merits can only be ascertained by the uncertain standard of his reader's feelings; and these must always be less lively with regard to a second performance; which, with every other excellence of the first, must necessarily want the powerful recommendations of novelty and surprise, and consequently fall very far short of the effect produced by their strong coöperation. In the _second_ place, it may be observed, in general, that wherever our impression of any work is favourable on the whole, its excellence is constantly exaggerated, in those vague and habitual recollections which form the basis of subsequent comparisons. We readily drop from our memory the dull and bad passages, and carry along with us the remembrance of those only which had afforded us delight. Thus, when we take the merit of any favourite poem as a standard of comparison for some later production of the same author, we never take its true average merit, which is the only fair standard, but the merit of its most striking and memorable passages, which naturally stand forward in our recollection, and pass upon our hasty retrospect as just and characteristic specimens of the whole work; and this high and exaggerated standard we rigorously apply to the first, and perhaps the least interesting parts of the second performance. Finally, it deserves to be noticed, that where a first work, containing considerable blemishes, has been favourably received, the public always expects this indulgence to be repaid by an improvement that ought not to be always expected. If a second performance appear, therefore, with the same faults, they will no longer meet with the same toleration. Murmurs will be heard about indolence, presumption, and abuse of good nature; while the critics, and those who had gently hinted at the necessity of correction, will be more out of humour than the rest at this apparent neglect of their admonitions.