Whatever may seem invidious or partial in the execution of my task is dependent not so much on the tenor of the work, as on its incompleteness. I have not entered into systematic criticism of all the painters of the present day; but I have illustrated each particular excellence and truth of art by the works in which it exists in the highest degree, resting satisfied that if it be once rightly felt and enjoyed in these, it will be discovered and appreciated wherever it exists in others. And although I have never suppressed any conviction of the superiority of one artist over another, which I believed to be grounded on truth, and necessary to the understanding of truth, I have been cautious never to undermine positive rank, while I disputed relative rank. My uniform desire and aim have been, not that the present favorite should be admired less, but that the neglected master should be admired more. And I know that an increased perception and sense of truth and beauty, though it may interfere with our estimate of the comparative rank of painters, will invariably tend to increase our admiration of all who are really great; and he who now places Stanfield and Callcott above Turner, will admire Stanfield and Callcott more than he does now, when he has learned to place Turner far above them both.
In three instances only have I spoken in direct depreciation of the works of living artists, and these are all cases in which the reputation is so firm and extended, as to suffer little injury from the opinion of an individual, and where the blame has been warranted and deserved by the desecration of the highest powers.
Of the old masters I have spoken with far greater freedom; but let it be remembered that only a portion of the work is now presented to the public, and it must not be supposed, because in that particular portion, and with reference to particular excellencies, I have spoken in constant depreciation, that I have no feeling of other excellencies of which cognizance can only be taken in future parts of the work. Let me not be understood to mean more than I have said, nor be made responsible for conclusions when I have only stated facts. I have said that the old masters did not give the truth of Nature; if the reader chooses, thence, to infer that they were not masters at all, it is his conclusion, not mine.